The Olmec civilization existed on the gulf coast of what three present day countries?

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big fat oof x

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.

i think you may have asked this twice, but i answered one of the