Lieutenant Colonel Youngdale landed under heavy enemy fire on late June 15, 1944 on Blue Beach 2 and formed a small group consisted from battalion reconnaissance party, which landed earlier that day. He led his group to the outskirts of village Chalan Kanoa and deployed battalion command post there. Youngdale regrouped the battalion and although not completely dug in, 4th battalion began shooting that evening. His unit later provided support fire during the attack on Aslito Airfield and helped repelled several Japanese counterattacks.