The A-4 Skyhawk, introduced into the US Navy and US Marine Corps on October 1, 1956, about a week and a half before I was born, was manufactured by Douglass Aircraft, which later on merged with McDonell aircraft to become McDonell Douglass which later was absorbed by Boeing. Unlike most Navy aircraft, it doesn't have folding wings since it was so compact, and it could carry a bigger bombload than a World War 2 B-17 Fortress bomber. It wasn't retired from US service until 1998 when the Marine Corps retired it. It was considered a great ground support aircraft, and it was very maneuverable which was why it was used for fighter training. I remember when stationed in San Diego, it would fly out of North Island Naval station and unlike other aircraft, it wasn't so loud. It was used until 2015 in the Israeli Air Force as a training aircraft.