United States Army Forces in the Philippines Northern Luzon

The United States Army Forces in the Philippines – Northern Luzon or United States Armed Forces in the Philippines – Northern Luzon (USAFIP-NL) (Tagalog: Sandatahang Lakas ng Estados Unidos sa Pilipinas - Hilagang Luzon (SLEUP-HL)/Hukbong Sandatahan ng Estados Unidos sa Pilipinas - Hilagang Luzon (HSEUP-HL) Ilocano: Fuerza Armada ti Estados Unidos iti Filipinas - Amianan ti Luzon (FAEUF-AL)) was the military and guerrilla organization active in the Philippines after the Japanese occupation. It was made up of United States Army and Philippine Commonwealth Army Soldiers, reservists and civilians.

It was active from January 01, 1942 to June 30, 1946 and commanded by Col. Moses, followed by Russell W. Volckmann.

Following the Japanese occupation of the Philippines through the campaign to liberate the country, the military and guerrilla operations from the units of USAFIP-NL operated in Northern Luzon, including the some provinces in Ilocos Norte, Ilocos Sur, La Union, Abra, Mountain Province, Cagayan, Isabela and Nueva Viscaya.

Supported by the local Filipino troops under the Commonwealth Army and Constabulary units, the guerrilla resistance fighters and the American liberation forces of the Sixth United States Army operated from January 9 to September 2, 1945. The Battle of Bessang Pass was a notable military victory.

Following the surrender of Japan, the USAFIP-NL was reorganized into the 2nd Infantry Division, Philippine Commonwealth Army was held to ongoing in North-Central Luzon from January 3, 1942 to June 30, 1946, followed by the USAFIP-NL military units.