The 501st “Vader’s Fist” Legion of Imperial Storm Troopers marches in the St. Patrick’s Day Parade in South Boston on Sunday, March 18. Kristina M. Holton—The Tech May. 8, 2016 Facebook Twitter Reddit Print The 501st “Vader’s Fist” Legion of Imperial Storm Troopers marches in the St. Patrick’s Day Parade in South Boston on Sunday, March 18. Kristina M. Holton—The Tech