United States Reed Graves John H. McGee Howard Perry Howard Frissell Tanaka Raizo "Ground Forces": Philippine Commonwealth Army Philippine Constabulary Ground units: Japanese Fourteenth Army Naval units: Japanese Imperial Navy 4,000 Troops 3000 Troops 12 Tanks 1 Light Carrier 4 Destroyers After Davao Force was dispersed on December 24, 1941, they went missing and no contact, General Joseph Vachon sent Lieutenant Colonel Howard Frissell to Digos, Davao and setup defense of Digos Junction area to prevent Japanese drive towards Digos-Pikit road and reaching Kabacan the southern terminus of Sayre Highway.

[1] The landing of one of the group of Sakaguchi detachment in Cotabato City and made a landing head to Pikit and Midsayap through the Mindanao River on April 28, 1942, made 101st Division commander General Vachon to order Digos Force to retreat towards Kabacan in fear of being cut off as Japanese are now fighting at the vicinity of Kabacan.

With artillery, tanks, and air support it easily secured a beachhead and made contact on 3rd Battalion 101st which took heaviest pressure.

Captain Floyd Forte a Visayas-Mindanao Force HQ staff rallied to held the line near the Haley Plantation.

Muira receiving reinforcements took and offensive campaign in coordination with Kawaguchi detachment who just landed in Cotabato City and Parang.

However, due to Kawaguchi was able to make a landing head in Midsayap through Mindanao River, General Vachon ordered Graves to retreat towards Kabacan in fear of being cut off.

Digos was the longest campaign in Mindanao during World War II as it reached four months before it was evacuated by 101st Division troops.