What new weapon of war was used for the first time in the fighting at Courcelette? What was its impact?

the manhattan project's indispensable man

president thomas jefferson hoped that the embargo act of 1807 would the united states by demonstrating to britain and france their dependence on american goods, convincing them to respect american neutrality and stop impressing american seamen. instead, the act had a devastating effect on american trade.

which statement explains one of the reasons world war 1 was so much more destructive than earlier conflicts