Answer: If your talking about WW1 then the industrial revolution.
Explanation: There were many new inventions like. Zeppelins- used to throw bombs without being noticed (especially during the night) Airplanes- Was first used as a spying gadget, then later on used as throwing bombs (attacking enemies). U-boats- (mostly used by Germany) Mainly for attacking boats underwater going unnoticed by enemies. Tanks- Was used for safe transportation (supplies) or to attack. Poison gas- (Mustard Gas!) was meant to distract and confused the enemy in the trenches to get them out of the trenches. Later found out that the gas was a great killing supply. Machine guns- Better usage than normal guns. Has more room for amo and usually leads to stale mate.
Basically, the conflict in the Mughal empire convey to the world how weak the Indian Condition is. So not long after that, the British and East Indian companies started to spread their influences there.
