Wonderopolis: How Fast Can a Tank Move?
Although the design for an armored fighting vehicle was patented in 1872 by Joseph Hawker, what we know as tanks weren’t built or used until 1916 in World War. They were called “tanks” because the British didn’t want the Germans to know what they were building, so they told the workers that these vehicles would transport water. The shipping crates were labeled “tank,” and the name stuck. Some advantages of tanks include their ability to traverse over rough terrain, their continuous tracks that don't go flat, their speed, and their powerful weapons and thick armor.
CITATION: How Fast Can a Tank Move?. n.d. Web. 2 December 2015. http://wonderopolis.org/wonder/how-fast-can-a-tank-move.