Germany, Italy, UK, USA, Ottoman Empire(Turkey), Bulgaria, France, Russia, Romania, Canada and Japan
During the world war, these wepons were considered the deadliest they used against enemies, rifles, barbed wires, machine guns, poison gasses, Armed aircrafts, tanks, and airships

The rifle, a standard weapon used by the british during the war
-Barbed wires, a blockaged use to block and defend enemies.
The machine guns, a heavy duty weapon used to destroy enemy tanks and bigger objects, or a large amount of enemies.

-Poison gasses, a toxic gas released from a bottle or a tank to give the enemy breathing problems and no fresh air to breathe from.

-Aircrafts, high flying fast vehicles in the air, throwing bombs and shooting down people and enemy defenses, a scary thing to hear when in battle