What did the Sumerians invent? the wheel spears warfare the compass

They had invented the wheels.

Explanation:

They didn't create warfare nor spears. They created harpoons, but not spears.  Plus warfare was going on before them, so we can easily exit that one out as well. Then the compass. They didn't create that either, but they did create, The wheel, the plow, metallurgy, and cuneiform.

The Answer Is "The Wheel"

I Hope It's Helpful :)

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