Rainier held the citadel of Monaco for four years before departing on April 10, 1301. In 1304, he was appointed Admiral of France after winning the Battle of Zierikzee.
Rainier held sway over Monaco's citadel for approximately four years before vacating the premises on April 10, 1301. He was subsequently appointed to a prominent role as Admiral of France following his triumph in the Battle of Zierikzee in 1304.