In the First and Second battles of Fort Wagner , Union forces suffered heavy losses in a failed attempt to capture the fort .
By summer of 1863 , the Union turned its attention to Battery Wagner on Morris Island , which guarded the harbor entrance from the southwest .
In the First and Second battles of Battery Wagner   , Union forces suffered heavy losses in a failed attempt to capture the fort .
By summer of 1863 , the Union turned its attention to Battery Wagner on Morris Island , which guarded the harbor entrance from the southwest .