I'm not 100% sure but it could be: Voluntary Exchange takes place between buyers and sellers:
(btw I copied and pasted from the question so I didn't take any content :D)
Hayes promptly made good on the secret pledges made during the electoral dispute to withdraw federal troops from states still under military occupation
Answer:
The Convention
Explanation:
James Madison's plan, known as the Virginia Plan, was the most important plan. The Virginia Plan was a proposal by the Virginia delegates for a bicameral legislative branch,
Answer:
Austro-Hungry declared war on Serbian and Entangled alliances which brought everybody else into the war
Explanation:
Caesar Augustus defeated his enemies, ending the civil war
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