M1918 Browning .30 Caliber Automatic Rifles M19123 Thompson .45 ACP Submachinegun Battle of Lamon Bay 52nd Infantry Regiment, is a reserve unit of Philippine Army during World War II.

Puerto Rican who is serving in US Army Lieutenant Colonel Virgilio Cordero was made commander in November 1941 and Major P.R Silerto as Executive Officer.

General Albert Jones commander of 51st Division ordered Colonel Cordero to intercept the Japanese in Sipocot, Camarines Sur.

[3] Inflicting heavy casualties to the Japanese but the landing in Lamon Bay cutoff the regiment from 51st Division and South Luzon Force.

Mauled and battered with its combat actions in Bicol Peninsula, Lamon Bay, and forced retreat lost almost half of its strength.