What was the first appearance of 3D models of humans or vehicles in a video game?

Question

When and where was the first 3D model of a human/vehicle implemented in games? Can you give a link to an image and/or an article?

Answer

One of the earliest 3D games with vehicles I remember was Battlezone (from 1980) where the enemy tanks, and in fact everything else, were rendered in wire frame, as this screen shot (taken from Wikipedia) shows.

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