diff --git a/hwe/sammo/Event/Action/OpenNationBetting.php b/hwe/sammo/Event/Action/OpenNationBetting.php
index a333859d..d551c41d 100644
--- a/hwe/sammo/Event/Action/OpenNationBetting.php
+++ b/hwe/sammo/Event/Action/OpenNationBetting.php
@@ -57,7 +57,7 @@ class OpenNationBetting extends \sammo\Event\Action
             'target' => 'DESTROY_NATION',
             'priority' => 1000,
             'condition' => Json::encode(
-                ["RemainNation", $this->nationCnt],
+                ["RemainNation", "<=", $this->nationCnt],
             ),
             'action' => Json::encode([
                 ["FinishNationBetting", $bettingID],
diff --git a/hwe/sammo/Event/Action/RaiseInvader.php b/hwe/sammo/Event/Action/RaiseInvader.php
index 186c6174..6e48412b 100644
--- a/hwe/sammo/Event/Action/RaiseInvader.php
+++ b/hwe/sammo/Event/Action/RaiseInvader.php
@@ -204,12 +204,16 @@ class RaiseInvader extends \sammo\Event\Action
             $nationObj->postBuild($env);
             refreshNationStaticInfo();
             $db->insert('event', [
+                'target' => 'month',
+                'priority' => 1000,
                 'condition' => Json::encode(true),
                 'action' => Json::encode([["AutoDeleteInvader", $invaderNationID]]),
             ]);
 
         }
         $db->insert('event', [
+            'target' => 'month',
+            'priority' => 1000,
             'condition' => Json::encode(true),
             'action' => Json::encode([["InvaderEnding"]]),
         ]);