High-explosive squash head (HESH) is a type of explosive ammunition that is effective against tank armour and is also useful against buildings. It was fielded chiefly by the British Army as the main explosive round of its main battle tanks during the Cold War. It was also used by other military forces, particularly those that acquired the early post-World War 2 British 105 mm Royal Ordnance L7A1, including Germany, India, Israel and Sweden.