One long term effect of the 19th amendment to the United States constitution in 1920 is

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

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:

i dont no the claim so it's hard to answer but i think he would go to the people to decide. : ) ; )