Battle of Wawa Dam

Battle of Wawa Dam
	Part of the Philippines Campaign of World War II
Date	February 20–May 31, 1945
Location	Montalban, Rizal, Philippines14°43′40″N 121°11′30″E / 14.72778°N 121.19167°E
Result	Allied victory
Belligerents
United States; Commonwealth of the Philippines;	Japan; Second Philippine Republic;
Commanders and leaders
Douglas MacArthur; Walter Krueger; Oscar Griswold; Charles P. Hall ; Yay Panlilio	Tomoyuki Yamashita Shizuo Yokoyama; Takashi Kobayashi; Osamu Kawashimai; Susumu Noguchi
Units involved
Ground units:; Sixth Army XIV Corps 6th Infantry Division; 43rd Infantry Division; 1st Cavalry Division; 112th Cavalry Regiment; ; XI Corps 37th Infantry Division; 38th Infantry Division; ; Filipino Guerilla Forces Marking Guerrillas; Hunters ROTC; Air units:; Fifth Air Force; 1st Marine Aircraft Wing Marine Aircraft Group 24; Marine Aircraft Group 32; ;	Ground units: ; Shimbu Group Kawabuchi Force; Kobayashi Force; 62nd Infantry Division; Noguchi Force; Naval units:; Imperial Japanese Navy Manila Naval Defense Group 3rd Naval Battalion; 4th Naval Battalion; ;
Strength
40,000	30,000
Casualties and losses
Filipino and U.S. forces; 315 killed; 1,010 wounded	Imperial Japanese military; ~ 7,000 killed

The Battle of Wawa Dam (Filipino: Labanan sa Dam ng Wawa), also known as the Seizure of Wawa Dam (Filipino: Pag-agaw sa Dam ng Wawa), was a subsidiary action of the Battle of Manila to secure the vital water sources east of the capital. It was the longest continuous combat during the Liberation of the Philippines, lasting from February 20–May 31, 1945. It also proved critical in neutralizing the Imperial Japanese Army's Shimbu Group, which controlled the Sierra Madre mountain range east of Manila in Southern Luzon.