Conversation so far:
What happened at Tarawa with David M. Shoup?
In mid-1943, Shoup was transferred to the staff of Major General Julian C. Smith, commander of the 2nd Marine Division, and planned the invasion of Betio on Tarawa Atoll.
Was David M. Shoup's invasion of Betio successful?
David M. Shoup's Battle of Tarawa resulted in an American victory.
What happened after the invasion of Betio with David M. Shoup?
For his leadership during the assault and the push inland David M. Shoup was awarded the Medal of Honor and the British Distinguished Service Order.

Question: Did he remain in the service or did he retire after the invasion?
Self-contained rewrite: Did David M. Shoup remain in service or did he retire after the Battle of Tarawa?