Background: Ira Hayes was born in Sacaton, Arizona, a town in the Gila River Indian Community in Pinal County. He was the eldest of six children born to Nancy Hamilton (1901-1972) and Joseph Hayes (1887-1978). The Hayes children were: Ira (1923-1955), Harold (1924-1925), Arlene (1926-1929), Leonard (1927-1952), Vernon (1929-1958), and Kenneth (born 1931). Joseph Hayes was a World War
Context: Hayes enlisted in the Marine Corps Reserve on August 26, 1942. He completed recruit training in Platoon 701 at Marine Corps Base, San Diego (renamed in 1948, Marine Corps Recruit Depot, San Diego) and in October volunteered for Marine paratrooper (Paramarine) training at the Marine Parachute School at Camp Gillespie located east of San Diego. He received the codename of Chief Falling Cloud. On November 30, he graduated from the Parachute Training School and received his silver "jump wings". On December 1, he was promoted to Private First Class.  On December 2, 1942, he joined Company B, 3rd Parachute Battalion, Divisional Special Troops, 3rd Marine Division, at Camp Elliott, California. On March 14, 1943, Hayes sailed for New Caledonia with the 3rd Parachute Battalion, which was assigned to Camp Kiser there on March 25 until September 26; the unit was redesignated in April as Company K, 3rd Parachute Battalion, 1st Marine Parachute Regiment of the I Marine Amphibious Corps. The 3rd battalion was shipped to Guadalcanal and remained there until it was sent to Vella Lavella, arriving on October 14 for occupational duty. On December 4, Hayes landed with the 3rd battalion on Bougainville and fought against the Japanese as a platoon automatic rifleman (BAR man) with Company K during the Bougainville Campaign. The 3rd Parachute Battalion was shipped back to Guadalcanal, and he stayed there until sometime in February when the Paramarines were sent back to California. The 1st Parachute Regiment was officially disbanded at Camp Pendleton, California, in February 1944.  Hayes was transferred to Company E, 2nd Battalion, 28th Marine Regiment of the newly activated 5th Marine Division at Camp Pendleton. Hayes sailed to Hawaii with his company in September for continued training with the 5th division as it trained for the invasion and capture of Iwo Jima.
Question: how was ira involved with wwII

Answer:
On December 2, 1942, he joined Company B, 3rd Parachute Battalion, Divisional Special Troops,