An international military exercise dubbed Brave Warrior 2015 will be held in Hungary from September 14 to 21, the Defence Ministry said. The exercise, a part of a series of NATO drills in several countries, will involve 1,800 troops. The operations will be headed by Hungarian officers, and will involve servicemen from Slovakia, Ukraine, Slovenia, Romania, Croatia and the US, the ministry said in a statement. The US will contribute the largest contingent, over 500 soldiers, the document added.