The CIA promised that the Bay of Pigs invasion would be a success.
Answer:
King George issued the Royal Proclation act of 1763
Answer:
may be the answer is "B" Trenches proved to be effective defenses, and relatively few soldiers died.
The answer would be C
The spoils system is when a political party, after winning an election, gives jobs to its supporters.
https://www.britannica.com/topic/spoils-system
Well assuming you mean America, and not considering Civil War, I would say the draft of the Constitution Thomas Jefferson want to make slavery illegal, but he needed the southern states approval.