 He served in the US Navy in the South Pacific during World War II.While serving in the Navy he produced many artworks showcasing his travels that he mailed to his fiancé, which were featured in a six-page spread and cover of the October 1943 issue of Life (magazine).Macouillard's designed two postage stamps, one of them being the commemorative 6¢ US postage stamp of Daniel Boone issued in September 1968.