Answer:
A larger Production weapons and a bigger food production and this caused the world for the first time a long attrition based war. coal and oil made new vehicles like submarines possible.
Explanation:
before World War 1, the wars used to be longer but a smaller scale. It was very expensive to maintain an large army with the newest technology . Why, because production used to be very slow. Many things that were invented during the 1800s contributed to a faster production. so by 1914, weaponry was way easier to maintain at a large scale.
