 Ramba uchinyora kuti ndima ino - MaJapan akapinda muPhilippinesnokukurumidza pashure pePearl Harbor, kuunza Zviteshi Zvokudzivirira zveManila neSubic Bays muhondo pamwe chete nemamwe mauto eU.S. neePhilippines ari muchitsuwa chacho. VaJapan vakatanga kumhara kuchamhembe kweLuzon, kure nokudzivirirwa kweManila Bay. Kunyange zvazvo Coast Artillery yakaita zvakanakisisa zvayo, zvombo zvayo zvakanga zvisina kuiswa zvakanaka pakurwisa kwokudenha kwevavengi uye zvaiva nyore kurwiswa nemhepo uye zvombo zvepamusoro. Pfuti dzomumigwagwa dzinosvika masendimita masere dzakanga dzatumirwa kuPhilippines muna 1940, asi nhanhatu dzakaparadzwa nekurwiswa nendege dzichipindurwa nekumhara kwekutanga, uye dzimwe mbiri dzakaiswa munzvimbo dzakagadziriswa paCorregidor neBataan, asi dzisina vashandi nemagandanga. Zvombo zvechiuto zve14-inch zveFort Drum uye zvombo zve 12-inch zveBattery Way neBattery Geary zvingangodaro zvaiva zvombo zvinodzivirira mhenderekedzo yegungwa muHondo yeCorregidor, asi zvose kunze kwezviviri zvombo zvechiuto zvakarohwa vasati vaJapan vasvika pachitsuwa chacho. Mauto eU.S. akazvipira musi wa6 May 1942, pashure pokuparadza zvombo zvavo. 