Tanks, the deadliest tank in the world is the Challenger 2. A tank is covered in thick metal armor to protect against enemy weapons. It also has a big cannon on it. Sometimes machine guns too. Tanks have tracks instead of wheels so they can move on rough terrain. A tank’s crew is usually 3 to 5 men. There was a tank that fought in WW2 called the T-34. Britain was the first to use tanks. They called them tanks so they could trick the Nazi’s. So, the Nazi’s thought that they were water tanks. Great Britain went into their trenches and blew all the Nazi’s up. Great Britain and all their allies won the war. I bet everyone in the world was happy except the Nazi’s.