A. - yes, you need to feed the empire!
B. - yes, you need to defend the empire!
C. - yes, you need to govern the empire!
D. - no, this would actually be detrimental to the empire, revolts would be rather bad than good for it.
Answer: Oil.
Japan wanted southern Indochina's supply of oil as they were starved for it and unable to maintain their military. On the same day they attacked Pearl Harbour they also attacked the Philippines to gain access to this oil. The attack on Pearl Harbour was to prevent any armada of US ships from retaking the Philippines, which they succeeded at doing.
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Britain and France
This is considered as one of the most powerful countries during that time. These countries also do not want the United States to be a powerful country. Confederate leaders will have an effect in confederacy break away. However, during the emancipation proclamation. England and France both banned slavery and cannot support the Confederacy which sought to retain slavery. It is quite clear that the Confederacy has little chance on their goal.
Answer:
Because Cuba was located in a close proximity to USA, particularly to the state of Florida and many populous cities were in close to it.
Also, the sea region that Cuba is located in is close to the major trade route between the USA and Europe.
In addition, if USSR had the ability to place their missiles in Cuba, they could put the entire USA in their missile range.
Explanation: