Answer:
northern and western hemisphere
Explanation:
hope this helps
Well it depends on what you are talking about.
WW1 was the first war to abandon the line styles of "Noble Fighting" found in contemporary Europe. In the old style soldiers walked in line and proceed to shoot each other till the other fled or simply all died. In the horrific new war trenches were dug and six machine gunners could hold off and assault of thousands of contemporary linemen. Doing so led to the horror of trench war which was bloody much more violent and dark.
Answer:
The Napoleonic War is your answer
