U.S. Marines joined forces with NATO allies and partner nations during Baltic Operations 16, building international relationships and strengthening security in the Baltic Sea region. (U.S. Marine Corps photo by Lance Cpl. Ashley Lawson/Released) - U.S. Marines joined forces with NATO allies and partner nations during Baltic Operations 16, building international relationships and strengthening security in the Baltic Sea region. (U.S. Marine Corps photo by Lance Cpl. Ashley Lawson/Released)