The Japanese occupied Manchuria after their invasion in 1931
<span>Once there was a food surplus, complexity within early river civilizations increased, as did t</span>rade and commerce, according to the archaeological record.
I think the labor force changed during World War One because it was not a bad time to be part of a moderate union that advocated against child labor and for improved working conditions and wages. ... On the flip side, unions did have to agree to regulations during wartime, such as their pledge not to strike, which would have stopped production and affected the war effort
They thought monopolies would keep competition alive.
