Key Points. 1  Cholinesterase inhibitor toxicity is due to a decrease in the ability of cholinesterase to breakdown acetylcholine which results in excessively high acetylcholine levels. 2  Cholinesterase inhibitors fall into two classes, organophosphorus compounds, and carbamates.
Tank platoons prior to the late 1980s consisted of a platoon headquarters squad and three tank squads, each consisting of one T-64, T-72 or T-80 tank for 12 personnel and 4 tanks total; platoons that used the older T-54, T-55 or T-62s added another crewmember for a total of 16.
The first six reached France in August 1916 .. Tanks were first used during the Battle of the Somme 1916. Later a smaller tank the Whippet  also came into service . The country that introduced the tank was Britain , it turned out to be a war winning weapon.