Technically WW1, but they switched sides.
The 2 sides of WW1 was the same as the ones of WW2 : Allies v.s Axis powers
All sides in WW1 used artillery.
All sides already possessed them before the war.
The two examples of direct control in ww1 included price controls and rent controls.
kuifkuil
WW1 and WW2
ww1 and 2
WW1 started in 1913 and continued till 1918. It had two sides: The Triple Alliance which consisted of Germany, Austria-Hungry (Which was one country) and Italy. Also there was The Triple Entente which was Britain, France and Russia.
A trapezoid with two congruent, opposite sides is an isosceles trapezoid.
Mauser and Springfiled are two.
Bloody and unfair