Why was this conquest a turning point in global history?

the conquest of Constantinople is an important turning point in global history because it (1) ushered in Pax Romana (2) began the Middle Ages (3) contributed to the rise of the Ottoman Empire (4) signified the end of the Napoleonic Wars.

Explanation:

please give me a brainliest

ok so u have2 basically

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.