Long before the arrival of the U.S. liberation forces, the guerrillas conducted intelligence operations that gathered precise inside information about the POWs in Los Baños and their guards. Many prisoners were long-time friends of partisan families before the war. With Lt. Col. Gustavo Inglés designated as overall guerrilla coordinator with the 11th Airborne Division, information was shared with Maj. Gen. Swing's Command Staff, including Col. Henry Muller (G-2), and Col. Douglas Quandt (G-3), as well as other top planners, who fine-tuned the final strategy.