[4] During World War II, When the Japanese invaded the southern Philippines, they occupied Davao City and Piso Point.
Piso Point is also strategically located at the south with many overhanging trees which allow the Japanese to initiate camouflage attacks against their enemies.
On May 10, 1945, Edgar D. Hoagland,[6] naval commander of the 24th Division of the U.S. army was given a special duty to survey the area for potential Japanese enemies hiding at the Davao valley including Piso Point.
On May 10, 1945, an anonymous tip from the guerillas brought Commander Edgar D. Hoagland[6] together with his Patrol Torpedo boats at Piso Point once more.
There, they have discovered that the Japanese have mastered the art of camouflage so well that they hid their suicide boats under mangroves with green, freshly cut palm leaves that enable them to be unseen at a distance greater than 100 yards.