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The government owns sixty thousand war elephants, every one seven or eight feet high. When fighting these elephants carry on their backs houses, and these houses are full of soldiers who shoot arrows at long range, and fight with spears at close quarters.-Zhao Rugua c. 1225
There was cavalry in addition to elephants. There is no evidence that the medieval Cholas used chariots; the iconic hindu symbol of battle.
Elephants were used to raise up the archers. These elephant carts would have captured the imagination of the Chinese geographer, but there were more numerous infantrymen on the ground, primarily armed with spears.