T-62 — An outdated tank of Soviet design and manufacture, the tank weighs 36.93 tons fully combat-loaded. The T-62 is equipped with a 115mm main gun and has a secondary armament of one 12.7mm machine gun (the commander's weapon) and one 7.62mm machine gun coaxially mounted with the main gun. The crew consists of a commander, a gunner, a loader, and a driver. Equipped with either a 700 horsepower or a vee-12 water-cooled diesel engine, either is capable of 34 mph. The T-62 tank is protected with steel armor up to 100mm thick on the front slope of the hull and 170mm on the gun mantlet.
T-54/55 — An outdated tank of Soviet design and manufacture, the tank weighs 35.9 tons fully combat-loaded. Both the T-54 and the T-55 are equipped with a 100mm main gun and a secondary armament of one 12.7mm machine gun (the commander's weapon) and one 7.62mm machine gun coaxially mounted with the main gun. The crew consists of a commander, a gunner, a loader, and a driver. Equipped with either a 520 (T-54) or a 580 (T-55) horsepower or a vee-12 water-cooled diesel engine, either is capable of 30 mph.
T-80 — The Soviet army's primary tank, the T-80 weighs 39.3 tons fully combat-loaded. It is equipped with a 125mm main gun and has a secondary armament of one 12.7mm machine gun (the commander's weapon) and one 7.62mm machine gun coaxially mounted with the main gun. The crew consists of a commander, a gunner, and a driver. Since the T-80 has an automatic loader, there is no need (or room) for a human loader. Equipped with a 700 horsepower water-cooled diesel engine, the tank is capable of 50 mph. Like the M-1/M-1A1, the T-80 has special armor that increases survivability. Unlike the M-1, the T-80 has been equipped with reactive armor.
Tank-Heavy — A maneuver unit, company, battalion/task force, or brigade that has a preponderance of tank units assigned to it. For example, a battalion/task force that has three tank companies and one mechanized infantry company would be tank heavy. A battalion that has two tank and two mechanized infantry companies would be a balanced task force. A battalion with three mechanized infantry and one tank company would be mech heavy.
Task Force — A grouping of units, under one commander, formed for the purpose of carrying out a specific operation or mission. In the past, this term was applied only to Army battalions that had additional units assigned to it, in particular units of a different type. For example, a tank battalion that normally has four tank companies might give up one tank company to a mechanized infantry battalion and receive a mechanized infantry company as well as one or more engineer platoons and an air defense platoon. That tank battalion would then become a tank-heavy task force.
XO — Short for executive officer, the officer second in command of a unit. Sometimes the XO is referred to as a deputy commander, as in the Red Army.