Details are pretty vague as i recall, the main character is a black male named Amos who joins the army, and eventually becomes a tank driver.
One detail i distinctly remember is him 'knocking out' an 'enemy' tank with a jerry can ( as a simulated incendiary device ) during an excercise.
Anybody remember? i think it was called Amos Joins the Army or something like that but i can't find it via google.
It appears it is
Tank Driver by William Butterworth from 1978.
http://www.alibris.com/booksearch.detail?invid=10134217158&browse=1&qwork=-59035552&qsort=&page=1
And it also appears that William Edmund Butterworth is better known as WEB Griffin.
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