Which court case set important precedent for determining whether or not a law was in violation of the US Constitution's separation of church and state?

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

the answer is lower nubia. plz mark brainliest i am trying to improve rank.

answer; taking up arms to defend the nation;