diff --git a/README.md b/README.md
index 5f633ca..f178d04 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Godot 4 tactical RPG prototype inspired by classic turn-based Romance of the Thr
 
 ## Current Slice
 
-- Thirty campaign scenarios.
+- Thirty-one campaign scenarios.
 - Grid movement.
 - Unit selection.
 - Move, attack, wait, end turn.
@@ -51,6 +51,7 @@ Godot 4 tactical RPG prototype inspired by classic turn-based Romance of the Thr
 - Xiakou Pursuit consumes the Jiangling Chase branch flags and pushes the river campaign toward Red Cliffs.
 - Red Cliffs Fleet consumes the Xiakou Pursuit branch flags and tests Cao Cao's chained fleet against the coalition vanguard.
 - Red Cliffs Fire consumes the Red Cliffs Fleet branch flags and turns the chained-fleet battle into a fire attack.
+- Huarong Retreat consumes the Red Cliffs Fire branch flags and forces Cao Cao through the coalition roadblock after the fleet burns.
 - Post-battle choices can save campaign flags that branch later briefing text, shop stock, and scenario events.
 - Scenario post-battle dialogue can play before the victory result panel.
 - Basic battle EXP, level-ups, and core first-tier class promotion routes.
diff --git a/data/campaign/campaign.json b/data/campaign/campaign.json
index 9c6ffe2..3b79166 100644
--- a/data/campaign/campaign.json
+++ b/data/campaign/campaign.json
@@ -153,6 +153,11 @@
       "id": "030_red_cliffs_fire",
       "title": "Red Cliffs Fire",
       "path": "res://data/scenarios/030_red_cliffs_fire.json"
+    },
+    {
+      "id": "031_huarong_retreat",
+      "title": "Huarong Retreat",
+      "path": "res://data/scenarios/031_huarong_retreat.json"
     }
   ]
 }
diff --git a/data/scenarios/031_huarong_retreat.json b/data/scenarios/031_huarong_retreat.json
new file mode 100644
index 0000000..2d0e749
--- /dev/null
+++ b/data/scenarios/031_huarong_retreat.json
@@ -0,0 +1,368 @@
+{
+  "id": "031_huarong_retreat",
+  "name": "Huarong Retreat",
+  "objectives": {
+    "victory": "Reach the Huarong road with Cao Cao, then defeat the coalition roadblock.",
+    "defeat": "Cao Cao is defeated or the battle reaches Turn 18."
+  },
+  "conditions": {
+    "victory": { "type": "all_units_defeated", "team": "enemy", "after_event": "huarong_road_opened" },
+    "defeat": [
+      { "type": "any_officer_defeated", "team": "player", "officer_ids": ["cao_cao"] },
+      { "type": "turn_reached", "turn": 18, "team": "player" }
+    ]
+  },
+  "briefing": {
+    "title": "Huarong Retreat",
+    "location": "Huarong Road, Jing Province, 208 CE",
+    "lines": [
+      "Red Cliffs burns behind Cao Cao as rain, smoke, and broken drums scatter the fleet's survivors toward Huarong.",
+      "The coalition pursuit is not a single army now, but roadblocks, riders, and old debts waiting in the mud."
+    ],
+    "conditional_lines": [
+      {
+        "campaign_flags": { "held_red_cliffs_line": true },
+        "lines": [
+          "Holding the fleet line preserved order among the survivors, but the delay let coalition pursuers close around Huarong."
+        ]
+      },
+      {
+        "campaign_flags": { "opened_huarong_retreat": true },
+        "lines": [
+          "Opening the retreat early put Cao Cao on the Huarong road sooner, though scattered detachments still stumble through the rain behind him."
+        ]
+      }
+    ]
+  },
+  "shop": {
+    "items": [
+      "bean",
+      "wine",
+      "iron_sword",
+      "training_spear",
+      "short_bow",
+      "hand_axe",
+      "war_axe",
+      "leather_armor",
+      "iron_armor"
+    ],
+    "conditional_items": [
+      {
+        "campaign_flags": { "held_red_cliffs_line": true },
+        "items": ["imperial_seal"]
+      },
+      {
+        "campaign_flags": { "opened_huarong_retreat": true },
+        "items": ["war_drum"]
+      }
+    ]
+  },
+  "roster": {
+    "max_units": 7,
+    "required_officers": ["cao_cao", "guo_jia"]
+  },
+  "formation": {
+    "cells": [[1, 3], [1, 4], [1, 5], [2, 2], [2, 3], [2, 4], [2, 5], [2, 6], [3, 2], [3, 3], [3, 4], [3, 5], [3, 6]]
+  },
+  "map": {
+    "width": 18,
+    "height": 11,
+    "terrain": [
+      "GGGGHHGGGGGGHHGGGG",
+      "GGFFHHGGRRGGHHFFGG",
+      "GGRRRRRRRRRRRRFFGG",
+      "GGGFGHGGGGRRGGGGGG",
+      "RRRRRRRRRRRRRRRRRR",
+      "GGGGGHHGGGRRGFFGGG",
+      "GGHHGFFFGGFFFGGHHG",
+      "GGHHGFFFGGFFFGGHHG",
+      "GGGGGGFFGGHHHGGGGG",
+      "GGFFGGGGGGHHHFFGGG",
+      "GGGGGGGGGGGGGGGGGG"
+    ]
+  },
+  "deployments": [
+    {
+      "unit_id": "cao_cao_ch31",
+      "officer_id": "cao_cao",
+      "team": "player",
+      "pos": [1, 4]
+    },
+    {
+      "unit_id": "guo_jia_ch31",
+      "officer_id": "guo_jia",
+      "team": "player",
+      "requires_joined": true,
+      "pos": [2, 4]
+    },
+    {
+      "unit_id": "zhang_he_ch31",
+      "officer_id": "zhang_he",
+      "team": "player",
+      "requires_joined": true,
+      "pos": [2, 3]
+    },
+    {
+      "unit_id": "xiahou_dun_ch31",
+      "officer_id": "xiahou_dun",
+      "team": "player",
+      "pos": [1, 5]
+    },
+    {
+      "unit_id": "dian_wei_ch31",
+      "officer_id": "dian_wei",
+      "team": "player",
+      "requires_joined": true,
+      "pos": [2, 5]
+    },
+    {
+      "unit_id": "xiahou_yuan_ch31",
+      "officer_id": "xiahou_yuan",
+      "team": "player",
+      "requires_joined": true,
+      "pos": [3, 3]
+    },
+    {
+      "unit_id": "cao_ren_ch31",
+      "officer_id": "cao_ren",
+      "team": "player",
+      "requires_joined": true,
+      "pos": [3, 4]
+    },
+    {
+      "unit_id": "guan_yu_roadblock",
+      "name": "Guan Yu Roadblock",
+      "class_id": "champion",
+      "team": "enemy",
+      "level": 29,
+      "pos": [14, 4],
+      "base": { "hp": 120, "mp": 12, "atk": 33, "def": 25, "int": 14, "agi": 20 }
+    },
+    {
+      "unit_id": "huarong_gate_captain",
+      "name": "Huarong Gate Captain",
+      "class_id": "guard_captain",
+      "team": "enemy",
+      "level": 28,
+      "pos": [12, 4],
+      "base": { "hp": 88, "atk": 29, "def": 23 }
+    },
+    {
+      "unit_id": "pursuit_rider",
+      "name": "Coalition Pursuit Rider",
+      "class_id": "elite_cavalry",
+      "team": "enemy",
+      "level": 28,
+      "pos": [15, 3],
+      "base": { "hp": 86, "atk": 30, "def": 17, "agi": 23 }
+    },
+    {
+      "unit_id": "rain_mist_advisor",
+      "name": "Rain Mist Advisor",
+      "class_id": "military_advisor",
+      "team": "enemy",
+      "level": 28,
+      "pos": [15, 5],
+      "skills": ["blaze", "great_mend"],
+      "base": { "hp": 76, "mp": 60, "atk": 8, "def": 14, "int": 31, "agi": 15 }
+    },
+    {
+      "unit_id": "huarong_spear_north",
+      "name": "Huarong Spear Guard",
+      "class_id": "infantry",
+      "team": "enemy",
+      "level": 28,
+      "pos": [12, 3],
+      "base": { "hp": 78, "atk": 29, "def": 21 }
+    },
+    {
+      "unit_id": "huarong_spear_south",
+      "name": "Huarong Spear Guard",
+      "class_id": "infantry",
+      "team": "enemy",
+      "level": 28,
+      "pos": [12, 5],
+      "base": { "hp": 78, "atk": 29, "def": 21 }
+    },
+    {
+      "unit_id": "mud_road_archer_north",
+      "name": "Mud Road Archer",
+      "class_id": "marksman",
+      "team": "enemy",
+      "level": 28,
+      "pos": [13, 2],
+      "base": { "hp": 70, "atk": 30, "def": 11, "agi": 22 }
+    },
+    {
+      "unit_id": "mud_road_archer_south",
+      "name": "Mud Road Archer",
+      "class_id": "marksman",
+      "team": "enemy",
+      "level": 28,
+      "pos": [14, 6],
+      "base": { "hp": 70, "atk": 30, "def": 11, "agi": 22 }
+    }
+  ],
+  "events": [
+    {
+      "id": "opening",
+      "once": true,
+      "when": { "type": "battle_start" },
+      "actions": [
+        { "type": "log", "text": "Cao Cao's army retreats through Huarong as coalition pursuers gather around the rain-soaked road." }
+      ]
+    },
+    {
+      "id": "opening_dialogue",
+      "once": true,
+      "when": { "type": "battle_begin" },
+      "actions": [
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Guo Jia", "text": "The smoke hides us from the river, but not from men who know this road." },
+            { "speaker": "Cao Cao", "text": "Then we leave them mud, corpses, and no clear count of our strength." },
+            { "speaker": "Zhang He", "text": "A roadblock waits ahead. It is placed like a question, not a trap." }
+          ]
+        }
+      ]
+    },
+    {
+      "id": "held_line_draws_pursuit",
+      "once": true,
+      "when": { "type": "turn_start", "team": "enemy", "turn": 2, "campaign_flags": { "held_red_cliffs_line": true } },
+      "actions": [
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Coalition Pursuit Rider", "text": "Cao Cao held the fleet too long. Close the road before his rearguard reforms." },
+            { "speaker": "Cao Ren", "text": "The line bought order, and order can still bite." }
+          ]
+        },
+        {
+          "type": "spawn_deployment",
+          "deployment": {
+            "unit_id": "late_pursuit_column",
+            "name": "Late Pursuit Column",
+            "class_id": "cavalry",
+            "team": "enemy",
+            "level": 28,
+            "pos": [16, 3],
+            "base": { "hp": 74, "atk": 28, "def": 15, "agi": 19 }
+          }
+        }
+      ]
+    },
+    {
+      "id": "opened_retreat_keeps_gap",
+      "once": true,
+      "when": { "type": "turn_start", "team": "player", "turn": 2, "campaign_flags": { "opened_huarong_retreat": true } },
+      "actions": [
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Xiahou Dun", "text": "The early retreat kept a gap in the road, but the rear units are still limping through smoke." },
+            { "speaker": "Cao Cao", "text": "A gap is enough. We widen it with steel." }
+          ]
+        }
+      ]
+    },
+    {
+      "id": "turn_4_rain_closes",
+      "once": true,
+      "when": { "type": "turn_start", "team": "enemy", "turn": 4 },
+      "actions": [
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Rain Mist Advisor", "text": "Rain turns retreat into a ledger. Count every wagon that sinks." },
+            { "speaker": "Guo Jia", "text": "They want us to move like a defeated army. Refuse the shape." }
+          ]
+        }
+      ]
+    },
+    {
+      "id": "huarong_road_opened",
+      "once": true,
+      "when": { "type": "unit_reaches_tile", "team": "player", "officer_ids": ["cao_cao"], "pos": [10, 4] },
+      "actions": [
+        {
+          "type": "set_objective",
+          "victory": "The Huarong road is open. Defeat the coalition roadblock.",
+          "defeat": "Cao Cao is defeated or the battle reaches Turn 18."
+        },
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Cao Cao", "text": "Huarong opens, but only if that roadblock breaks." },
+            { "speaker": "Guan Yu Roadblock", "text": "The road remembers old favors and old wars. Show me which one walks here today." }
+          ]
+        },
+        {
+          "type": "spawn_deployments",
+          "deployments": [
+            {
+              "unit_id": "huarong_halberd_guard",
+              "name": "Huarong Halberd Guard",
+              "class_id": "guard_captain",
+              "team": "enemy",
+              "level": 28,
+              "pos": [16, 4],
+              "base": { "hp": 86, "atk": 29, "def": 23 }
+            },
+            {
+              "unit_id": "coalition_crossbow_screen",
+              "name": "Coalition Crossbow Screen",
+              "class_id": "archer",
+              "team": "enemy",
+              "level": 28,
+              "pos": [16, 5],
+              "base": { "hp": 64, "atk": 28, "def": 9, "agi": 20 }
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "id": "turn_9_rear_straggles",
+      "once": true,
+      "when": { "type": "turn_start", "team": "player", "turn": 9 },
+      "actions": [
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Zhang He", "text": "The rear units are still straggling. Every turn gives the pursuers another banner." },
+            { "speaker": "Cao Cao", "text": "Then make every banner pay a toll." }
+          ]
+        }
+      ]
+    }
+  ],
+  "rewards": {
+    "gold": 6000,
+    "items": ["bean", "wine", "war_drum"]
+  },
+  "post_battle_dialogue": [
+    { "speaker": "Guo Jia", "text": "Huarong did not swallow us, but the retreat has changed the shape of the southern campaign." },
+    { "speaker": "Cao Ren", "text": "If we stand a rearguard here, Jiangling's survivors may gather. If we run north, Xuchang hears of us sooner." },
+    { "speaker": "Cao Cao", "text": "Decide whether we secure the Huarong rearguard or rush the heartland before rumor outruns us." }
+  ],
+  "post_battle_choices": [
+    {
+      "id": "secure_huarong_rearguard",
+      "label": "Secure Rearguard",
+      "description": "Cao Cao steadies the Huarong road so more southern survivors can regroup before the next march.",
+      "set_flags": { "secured_huarong_rearguard": true, "rushed_xuchang_return": false },
+      "gold": 800,
+      "items": ["imperial_seal"]
+    },
+    {
+      "id": "rush_xuchang_return",
+      "label": "Rush North",
+      "description": "Cao Cao drives north quickly, reaching the heartland before rumor can turn retreat into panic.",
+      "set_flags": { "secured_huarong_rearguard": false, "rushed_xuchang_return": true },
+      "gold": 600,
+      "items": ["war_drum"]
+    }
+  ]
+}
diff --git a/docs/DATA_MODEL.md b/docs/DATA_MODEL.md
index 8b07a59..46f45b3 100644
--- a/docs/DATA_MODEL.md
+++ b/docs/DATA_MODEL.md
@@ -41,6 +41,7 @@ data/scenarios/027_jiangling_chase.json
 data/scenarios/028_xiakou_pursuit.json
 data/scenarios/029_red_cliffs_fleet.json
 data/scenarios/030_red_cliffs_fire.json
+data/scenarios/031_huarong_retreat.json
 ```
 
 ## Campaign
@@ -83,7 +84,8 @@ The campaign file defines scenario order, resource paths, and officers who are a
     { "id": "027_jiangling_chase", "title": "Jiangling Chase", "path": "res://data/scenarios/027_jiangling_chase.json" },
     { "id": "028_xiakou_pursuit", "title": "Xiakou Pursuit", "path": "res://data/scenarios/028_xiakou_pursuit.json" },
     { "id": "029_red_cliffs_fleet", "title": "Red Cliffs Fleet", "path": "res://data/scenarios/029_red_cliffs_fleet.json" },
-    { "id": "030_red_cliffs_fire", "title": "Red Cliffs Fire", "path": "res://data/scenarios/030_red_cliffs_fire.json" }
+    { "id": "030_red_cliffs_fire", "title": "Red Cliffs Fire", "path": "res://data/scenarios/030_red_cliffs_fire.json" },
+    { "id": "031_huarong_retreat", "title": "Huarong Retreat", "path": "res://data/scenarios/031_huarong_retreat.json" }
   ]
 }
 ```
diff --git a/docs/ROADMAP.md b/docs/ROADMAP.md
index d735a9c..28cbe3c 100644
--- a/docs/ROADMAP.md
+++ b/docs/ROADMAP.md
@@ -21,7 +21,7 @@
 - Destination victory conditions and objective map markers exist.
 - Turn-limit conditions and HUD turn-limit display exist.
 - Victory reward summary is visible.
-- Next-battle flow exists across the current thirty-scenario campaign.
+- Next-battle flow exists across the current thirty-one-scenario campaign.
 - Campaign completion and new-campaign reset exist.
 - Reward inventory can be brought into the next battle.
 
@@ -52,7 +52,7 @@
 - Party roster persistence has a first save-file skeleton.
 - Level, experience, and equipment persistence.
 - Chapter selection and save/load.
-- Linear thirty-scenario campaign order exists.
+- Linear thirty-one-scenario campaign order exists.
 - Save reset exists.
 - Victory rewards, consumable counts, equipment stock, and equipped gear persist.
 - A basic pre-battle shop with scenario-specific stock exists. Sell-back and richer item management are still planned.
@@ -90,6 +90,7 @@
 - Twenty-eighth-scenario content exists with Xiakou pursuit, river harbor pressure, Sun-Liu coalition hints, and 027 branch reactions.
 - Twenty-ninth-scenario content exists with Red Cliffs fleet pressure, chained ships, coalition vanguard, and 028 branch reactions.
 - Thirtieth-scenario content exists with Red Cliffs fire ships, chained-fleet danger, coalition fire tactics, and 029 branch reactions.
+- Thirty-first-scenario content exists with Huarong retreat pressure, coalition roadblocks, Cao Cao's escape route, and 030 branch reactions.
 
 ## Milestone 5: Presentation