The 1st San Marco Regiment (Italian: 1° Reggimento San Marco), located in Brindisi, is an amphibious formation of the Italian Navy. They are the Italian marines. Until the middle of the 1990s the unit was known as the San Marco Battalion (Battaglione San Marco), until it was expanded beyond battalion size because of the new geopolitical situation after the end of the Cold War and an increasing number of international missions, after as the San Marco Regiment. In 2013 it became part of the San Marco Marine Brigade as 1st San Marco Regiment.