diff --git a/resources/maps/africa/manifest.json b/resources/maps/africa/manifest.json
index c101cae4c..30e414b73 100644
--- a/resources/maps/africa/manifest.json
+++ b/resources/maps/africa/manifest.json
@@ -103,7 +103,7 @@
     {
       "coordinates": [1094, 1093],
       "flag": "cd",
-      "name": "Democratic Republic of the Congo",
+      "name": "DR Congo",
       "strength": 2
     },
     {
diff --git a/resources/maps/europe/manifest.json b/resources/maps/europe/manifest.json
index cfd706e40..2cae0402a 100644
--- a/resources/maps/europe/manifest.json
+++ b/resources/maps/europe/manifest.json
@@ -169,7 +169,7 @@
     {
       "coordinates": [517, 1483],
       "flag": "dz",
-      "name": "People's Democratic Republic of Algeria",
+      "name": "Algeria",
       "strength": 1
     },
     {
diff --git a/resources/maps/gatewaytotheatlantic/manifest.json b/resources/maps/gatewaytotheatlantic/manifest.json
index 45651537e..4a350e3fe 100644
--- a/resources/maps/gatewaytotheatlantic/manifest.json
+++ b/resources/maps/gatewaytotheatlantic/manifest.json
@@ -85,7 +85,7 @@
     {
       "coordinates": [1609, 1837],
       "flag": "dz",
-      "name": "People's Republic of Algeria'",
+      "name": "Algeria",
       "strength": 2
     },
     {
diff --git a/resources/maps/oceania/manifest.json b/resources/maps/oceania/manifest.json
index ebbee416e..4fc8c2471 100644
--- a/resources/maps/oceania/manifest.json
+++ b/resources/maps/oceania/manifest.json
@@ -85,7 +85,7 @@
     {
       "coordinates": [143, 37],
       "flag": "la",
-      "name": "Lao People's Democratic Republic",
+      "name": "Lao PDR",
       "strength": 1
     },
     {
@@ -115,7 +115,7 @@
     {
       "coordinates": [834, 215],
       "flag": "fm",
-      "name": "Federated States of Micronesia",
+      "name": "Micronesia",
       "strength": 1
     },
     {
diff --git a/resources/maps/world/manifest.json b/resources/maps/world/manifest.json
index c4aca9980..d5460fc5d 100644
--- a/resources/maps/world/manifest.json
+++ b/resources/maps/world/manifest.json
@@ -253,7 +253,7 @@
     {
       "coordinates": [1074, 508],
       "flag": "cd",
-      "name": "The Democratic Republic of the Congo",
+      "name": "DR Congo",
       "strength": 1
     },
     {
diff --git a/tests/NationNameLength.test.ts b/tests/NationNameLength.test.ts
new file mode 100644
index 000000000..5bfc4960b
--- /dev/null
+++ b/tests/NationNameLength.test.ts
@@ -0,0 +1,55 @@
+import fs from "fs";
+import { globSync } from "glob";
+import path from "path";
+
+type Nation = {
+  name?: string;
+};
+
+type Manifest = {
+  nations?: Nation[];
+};
+
+describe("Map manifests: nation name length constraint", () => {
+  test("All nations' names must be ≤ 27 characters", () => {
+    const manifestPaths = globSync(
+      path.resolve(process.cwd(), "resources/maps/**/manifest.json"),
+    );
+
+    expect(manifestPaths.length).toBeGreaterThan(0);
+
+    const violations: string[] = [];
+
+    for (const manifestPath of manifestPaths) {
+      try {
+        const raw = fs.readFileSync(manifestPath, "utf8");
+        const manifest = JSON.parse(raw) as Manifest;
+
+        (manifest.nations ?? []).forEach((nation, idx) => {
+          const name = nation?.name;
+          if (typeof name !== "string") {
+            violations.push(
+              `${manifestPath} -> nations[${idx}].name is not a string`,
+            );
+            return;
+          }
+          if (name.length > 27) {
+            violations.push(
+              `${manifestPath} -> nations[${idx}].name "${name}" has length ${name.length} (> 27)`,
+            );
+          }
+        });
+      } catch (err) {
+        violations.push(
+          `Failed to parse ${manifestPath}: ${(err as Error).message}`,
+        );
+      }
+    }
+
+    if (violations.length > 0) {
+      throw new Error(
+        "Nation name length violations:\n" + violations.join("\n"),
+      );
+    }
+  });
+});