Filipino Col. Eustaquio S. Baclig (PA), a 1918 U.S. Military Academy graduate, was appointed as division chief of staff.

When 102nd Division was organized to cover Cagayan sector, General Vachon moved his headquarters at Kabacan in Cotabato at the southern end of Sayre Highway for him to focus in Davao-Cotabato until its surrender.

Major Frank D. McGee (retired) was recalled to assumed command of 2nd Battalion 101st Infantry, so Colonel Hilsman focus on setting the defense.

[3] Lieutenant Colonel Francisco Torres, PC assistant inspector of Mindanao island arrived in Davao and became Hilsman's executive officer.

Colonel Hilsman pullout his forces out of the city and retreated northwest, where he and remnants has to hike the jungle just to reach Bukidnon.

[4] General Vachon ordered two battalions under Lieutenant Colonel Howard Frissell to move out for Davao from Malaybalay to defend Digos-Pikit road.

[6] A battery of QF 2.95inch Mountain Guns under Captain Manuel Acosta arrived in Digos sector giving some psychological uplift of the defending force.

[3] In January 1942, 1st Battalion, 102nd Infantry under Captain Arsenio Tolentino with newly promoted Lieutenant Colonel Alvin T. Wilson as Senior Instructor.

1st Battalion, 106th Infantry under Major Jose D. Garcia, is now activated from High School and College boys in Zamboanga Peninsula.

Supported by Constabularies and service troops to prevent Japanese from reaching Kabacan the southern end of Sayre Highway.