Respuesta :
events that occurred in the 20th century that were mainly because of the wars were the fall of four major monarchies (Russian, Austrian/Hungarian, German and Turkish) and conflicts in alliances (world war 1). and a huge event that occurred in the 20th century was the great depression.
sorry i didn't include all of it, that's as much as i could remember haha, hope this helped at least a little!
Answer:
The turn of the 20th century brought with it an array
of changes and alterations that had not previously been seen in the modern world. These industrial economic related innovations in the market created new geographic setting and division among the US population.
Explanation: