The Battle for the Recapture of Bataan from 31 January to 21 February 1945, by US forces and Allied Filipino guerrillas from the Japanese, part of the campaign for the liberation of the Philippines, was waged to secure the western shore of Manila Bay to enable the use of its harbor and open new supply lines for American troops engaged in the crucial battle for the liberation of Manila. The Bataan peninsula's recapture also avenged the surrender of the defunct United States Armed Forces in the Far East (USAFFE) to invading Japanese forces on 9 April 1942.