diff --git a/hwe/compare/turn_command_trace.php b/hwe/compare/turn_command_trace.php
index 59924632..7a989783 100644
--- a/hwe/compare/turn_command_trace.php
+++ b/hwe/compare/turn_command_trace.php
@@ -176,12 +176,29 @@ function comparisonApplyTurnFixtureSetup(mixed $setup): void
         if ($generalIds === [] || $nationIds === []) {
             throw new \InvalidArgumentException('isolateWorld requires generals and nations');
         }
+        $generalTemplate = $db->queryFirstRow(
+            'SELECT * FROM general WHERE no IN %li ORDER BY no LIMIT 1',
+            $generalIds,
+        );
+        if ($generalTemplate === null) {
+            throw new \InvalidArgumentException('isolateWorld requires at least one existing fixture general');
+        }
         $db->delete('general_turn', 'general_id NOT IN %li', $generalIds);
         $db->delete('rank_data', 'general_id NOT IN %li', $generalIds);
         $db->delete('nation_turn', 'nation_id NOT IN %li', $nationIds);
         $db->delete('troop', '1 = 1');
         $db->delete('diplomacy', '1 = 1');
         $db->delete('general', 'no NOT IN %li', $generalIds);
+        foreach ($generalIds as $generalId) {
+            if ($db->queryFirstField('SELECT no FROM general WHERE no = %i', $generalId) !== null) {
+                continue;
+            }
+            $newGeneral = $generalTemplate;
+            $newGeneral['no'] = $generalId;
+            $newGeneral['owner'] = 0;
+            $newGeneral['name'] = "fixture-general-{$generalId}";
+            $db->insert('general', $newGeneral);
+        }
         $db->delete('nation', 'nation NOT IN %li', $nationIds);
         $db->update('city', [
             'nation' => 0,