diff --git a/hwe/sammo/Enums/EventTarget.php b/hwe/sammo/Enums/EventTarget.php
new file mode 100644
index 00000000..cd8265f0
--- /dev/null
+++ b/hwe/sammo/Enums/EventTarget.php
@@ -0,0 +1,12 @@
+<?php
+namespace sammo\Enums;
+
+enum EventTarget: string{
+  //YearMonth 변경 전에 처리해야할 Month 이벤트
+  case PreMonth = 'PRE_MONTH';
+  case Month = 'MONTH';
+  //PostMonth는 없음
+  case OccupyCity = 'OCCUPY_CITY';
+  case DestriyNation = 'DESTROY_NATION';
+  case United = 'UNITED';
+}
\ No newline at end of file
diff --git a/hwe/sql/schema.sql b/hwe/sql/schema.sql
index b655ee53..397a805c 100644
--- a/hwe/sql/schema.sql
+++ b/hwe/sql/schema.sql
@@ -484,7 +484,7 @@ CREATE TABLE IF NOT EXISTS `ng_history` (
 ##############################
 CREATE TABLE `event` (
 	`id` INT(11) NOT NULL AUTO_INCREMENT,
-	`target` ENUM('MONTH', 'OCCUPY_CITY', 'DESTROY_NATION','PRE_MONTH') NOT NULL DEFAULT 'MONTH',
+	`target` ENUM('MONTH', 'OCCUPY_CITY', 'DESTROY_NATION','PRE_MONTH', 'UNITED') NOT NULL DEFAULT 'MONTH',
 	`priority` INT(11) NOT NULL DEFAULT '1000',
 	`condition` MEDIUMTEXT NOT NULL COLLATE 'utf8mb4_bin',
 	`action` MEDIUMTEXT NOT NULL COLLATE 'utf8mb4_bin',