What event determined the start of the middle ages?

the images of war are haunting

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.

the deaths of over a million communist soldiers

post-traumatic stress disorder in veterans

cutting down of the rainforest