They allowed Germany to take France easily
What 'technologies' are you thinking of?
Yes, Income tax was introduced to Canada during World War 1. It was introduced to help pay for the costs of everything needed for the war.
me me
The inventions of sound recording and the phonograph.
Many communication technologies were pioneered during World War I, the most notable of which was radio. Other technologies used then were telegraph and newspapers.
tank
Gunpowder
all haha
tanks & airplanes
how did the government finance world war one
what was learned during the war? how to build rockets and use them for bombs and planes