The advanced guard (or vanguard) are the soldiers ahead or detached from the rest of the troops, providing security and looking out for the enemy.

Artillery is one of the three arms of an army. The artillery arm uses high-caliber weapons, such as cannons in Clausewitz’s lifetime. In the 21st century, artillery may contain howitzers and cruise missiles.

A base of operations provides all the necessary support and resources for the functioning of an army.