¿Existe una relación entre las alianzas de las potencias europeas antes y después del inicio de la guerra?

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

it allows shippers to carry commercial goods, which allows them to save time and money.

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