Fort Frank is located on Carabao Island in Manila Bay.
Caballo Island was developed by the U. S. Army Corps of Engineers into Fort Frank as part of the Manila Bay defenses with gun batteries, mortars, anti-aircraft guns and other defenses and tunnels. Named "Fort Frank" in honor of U. S. Army Brigadier General Royal T. Frank.
12" mortar battery. First fired on January 31, 1942. A total 30 rounds were fired at Japanese gun positions near Ternate by the mortars. On February 6, 1942 on mortar suffered a muzzle burst. Casualties were one Philippine Scout killed and seven wounded, including Captain R.J. White, the battery commander.
Battery Frank North
On February 18, 1942 the Japanese concentrated most of their fire power on Fort Frank. At 9:30 p.m. they scored a hit on Battery Frank North Number 4 gun wounding seven of its crew.
March 2, 1942 shot down one aircraft. On March 6, 1942 shot down a Japanese plane on reconnaissance over the fort.
The morning of March 20th, the garrison was lined up in Crofton Tunnel to be inoculated. While waiting in line a 240mm shell penetrated the roof of the tunnel and exploded. Killed were 28 men while 26 were wounded, several of these latter mortally. The wounded and dead were removed that night to Fort Mills. This did not prevent Battery Koehler from firing back at the enemy this night or the next day.
Engineers of the Southwest Pacific, 1941-45, Volume 4 pages 562-563, 568, 570-571, 739 (index), 751 (index), 758 (index), 761 (index)
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February 4, 2018