What caused some soldiers on the front lines to experience shell shock in world war 1?

During the age of imperialism, suez canal connected which two bodies of water?

Which best describes the albany plan of union? it was a failed plan to eliminate the colonists’ right to vote.it was a failed plan to unite the american colonies.it was a failed plan to make the colonies independent from britain.it was a failed plan to strengthen individual colonial governments.?

What was one reason that southern states passed laws after 1800 to discourage manumission? 1)southern whites feared that freed blacks would seek revenge for past treatment as slaves. 2) northern leaders pressured southerners to liberate enslaved people. 3)southern states needed an inexpensive labor force to work in southern factories. 4)northern whites had sold their slaves to southerners before slavery was banned in the north.