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At the time of hitler's 1939 invasion of poland, the us had a policy of appeasement negotiation opposition neutrality

Examine these two paintings that depict famous events from american history. the image on the left, painted in 1940, shows the signing of the u.s. constitution in 1787. the image on the right, painted in 1836, shows the american victory at the battle of yorktown in 1781.which of these paintings should be considered a secondary source?

What was the purpose of the u.s navy's convoy system