Complex sentence: It was disbanded after the war in mid- 1919, but was re-raised in 1937 and 1940 before deploying to New Guinea in 1942 where it supported military forces by spotting for artillery and providing reconnaissance and close air support.
Split into simpler sentences: It was disbanded after the war in mid- 1919, but re-raised in 1937 and 1940. In 1942 it deployed to New Guinea, where it supported military forces by spotting for artillery and providing reconnaissance and close air support.