Trenches were dug in a zigzag pattern so that if an enemy entered the trench, he could not fire straight down the line. ... The main trench lines were connected by communicating trenches, allowing for the movement of messages, supplies, and soldiers and were lined with barbed wire.
A)Developed new medical practices
The climate along the equator in Africa is Hot or tropical
The draft is one major way
the second would be the change from peace time production to war production hope this helps sorry if it doesnt
Market and command economic systems
