The Irish Brigade was a unit of soldiers primarily composed of Irish immigrants who fought for the Union during the American Civil War. Formed in 1861, it was known for its bravery and distinctive green uniforms, which reflected the Irish heritage of its members. The brigade participated in several key battles, including the Battle of Antietam and the Battle of Gettysburg. The Irish Brigade was part of the larger Union Army and played a significant role in promoting the contributions of Irish Americans to the war effort. Its legacy is remembered for both its military achievements and its efforts to honor the Irish culture within the context of American history.