From February 1944 until March 1945, Snowden was a company commander with the 23rd Marines during the capture of Roi-Namur during the Battle of Kwajalein, the capture of Saipan and the capture of Tinian. During the assault on Iwo Jima, he commanded Company F, 2nd Battalion, 23rd Marine Regiment, 4th Marine Division. During the battle, he was wounded and medically evacuated. In May 1945, he joined the 3rd Marine Division on Guam, serving with the 3rd Marine and 9th Marine Regiments until December 1945.