Army - 1st Battalion 502nd Infantry Regiment - Infantry Branch- MugThe Infantry Branch (also known as the "Queen of the Battle") is a branch of the United States Army first established in 1775. Ten companies of riflemen were authorized by a resolution of the Continental Congress on 14 June 1775. However, the oldest Regular Army infantry regiment, the 3rd Infantry Regiment, was constituted on 3 June 1784, as the First American Regiment