Lieutenant Colonel Constant L. Irwin

…commanded the 31st Infantry in the Philippines from July to November 1940 (4 months) as interim commander while awaiting the arrival of Colonel Jones.

Afterward he served as General MacArthur’s G-3. Colonel Irwin was born in 1892, served in World War I and World War II, retired in 1944 as a brigadier general, died in 1977, and is buried at Colma, California.