In Puerto Rico it was useful, in Cuba not so much. Cubans perceived the outcome as occupation and didn't want to have United States occupation in their country. Puerto-Ricans had a form of a civilian government with independence and Puerto-rican citizenship but the country belonged to US.
The election of Democrat Jimmy Carter as President in 1976 brought a new emphasis, based on Carter's personal ideology, to U.S. foreign policy. Carter believed that the nation's foreign policy should reflect its highest moral principles—a definite break with the policy and practices of the Nixon Administration
Hitler made a major mistake by making all military decisions by himself, without taking advice. His decision to invade the Soviet Union was a complete failure because Germany was not prepared and they had misjudged the Soviet Union’s defensive power.
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A very good one you should watch it sometime
Yes they actually won two one in 1920 and the other in 1948