What ware three reasons why the us civil war was the first modern war

It was an attempt to weaken South's economy and receive the war effort. ... Why is the Civil War considered the first "Modern War"? It was considered the first modern war because it was the first war after the industrial revolution. More technology was invented and modern weapons were used

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)