Probably the most famous unit was the 54th Massachusetts Infantry Regiment. In February 1863, Massachusetts governor John Albion Andrew, issued the first call for black soldiers in the North. Over 1,000 men joined, many from as far away as Canada and even the Caribbean. To lead them the governor chose Robert Gould Shaw, a young white officer. On July 18, 1863, they attacked Fort Wagner guarding the southern approach to Charleston Harbor. The 54th lost 600 men in the attack including Colonel Shaw—nearly half of the regiment. The fort was defended by 1,700 Confederates.