What were some ways that theU. S. "helped” their allies in the war, even before they officially joined the war?

The U.S. povided arms, tanks, ships, fuel and food

Explanation:

They sent much needed suppiles to the allies mainly (UK)

Explanation:

The USA passed act's like the "Lend-Lease act" to send suppile to its allies oversea's before the war. And when they declared war and sided with the allies they sent mililtary support to the allies.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

polisit can also mean a body of citizens. in modern historiography, polis is normally used to indicate the ancient greek city-states, like classical athens and its contemporaries, and thus is often translated as "city-state". the body of citizens came to be the most important meaning of the term polis in ancient greece.