PLEASE HELP ITS URGENT How did technology impact the Turks ability to siege Constantinople?
The Ottoman attacks persisted for 53 days. Why might the Byzantines have struggled to fight back?
To which enduring issues does the fall of Constantinople connect?
Many historians assert that the Ottoman siege of Constantinople changed the course of history for mankind. Why do you think this is a common belief? PLEASE HELP

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

ayatollah khomeini can best be described as the leader who declared iran to be an islamic republic.

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.

continental currency was denominated in dollars from $​1⁄6 to $80, including many odd denominations in between.