The text boxes in the left panel have been placed in a random order. Restore the original order by dragging the text boxes from the left panel to the right panel.
a) It weighed 14 tons, got stuck in trenches and crawled over rough terrain at only two miles per hour.
d) On September 6, 1915, a prototype tank nicknamed Little Willie rolls off the assembly line in England.
b) They have made current tanks able to easily cross various military battlefields.
c) Then improvements were made to the original prototype.