ST. PATRICK'S DAY PARADE Sailors march in the 113th annual St. Patrick's Day Parade in South Boston, March 16, 2014. Listed as one of the largest annual parades in the United States today, it commemorates Boston's first major Irish celebration in 1737 and celebrates the city's rich military history. The sailors are assigned to USS Constitution. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 534346-T-LEY82-531.jpg Photo Gallery