In December 1943, he picked up two more kills, a Zero on the 15th and another Zero on the 21st, during the build-up for the landings at Cape Gloucester. Loisel picked up his eighth victory on January 23, 1944 over a Zero. On April 3, 1944, while escorting Douglas A-20 Havoc bombers near Hollandia, New Guinea, he shot down a Nakajima Ki-43 "Oscar" fighter and a Mitsubishi A6M3 "Hamp" fighter over Lake Sentani, giving him his ninth and tenth kills and making him a double ace. On January 22, 1944, he assumed command of the 432nd Fighter Squadron. This unit was tasked with striking targets in New Guinea and the Indonesian Spice Islands to support General Douglas MacArthur's return to the Philippines. In August 1944, Loisel returned to the United States as a major.