The two most important weapon systems to come out of WWI was the Tank and the modern concept of aerial warfare.
Although air combat was considered before the war. It was not until the development of technologies during the war that it came into it's own. Prior to WWI most of the military powers saw aeroplanes as a way of observing the enemy. The concept of close air support, strategic bombing, the dedicated bomber, the dedicated fighter, aircraft carriers all were developed during WWI.
The first use of tanks the D1 or Mark I was by the British in the Battle of Flers-Courcellette on September 15th, 1916 during the Battle of the Somme. They are called Tanks because the term "tank" was considered innocuous so any spies would not get suspicious when they were shipped to France.
Aircraft carriers (aircraft).
The Key differences in World War Two Era Weapons and Modern Weapons, is, that WW2 weapons were designed to kill, while Modern firearms are only designed to neutralize, or such.
the most dramatic weapon was the airplane
The development of devastating new weapons technologies.
The most devastating world war 1 weapons had to be machine guns, mustard gas, and artillery. Mustard gas was a really nasty chemical that created big blisters on the flesh and lungs if inhaled.
Aircraft carriers (aircraft).
the German surrender of its weapons and most of its navy.
Thompson, M1 Ga-rand ,Browning ,MG42 , MP40 , flamethrower
Weapons
The Key differences in World War Two Era Weapons and Modern Weapons, is, that WW2 weapons were designed to kill, while Modern firearms are only designed to neutralize, or such.
The most important weapons, just so happen to be the only weapons used (other than ship's anti-aircraft systems): Dive bombers, Torpedo bombers, and Fighter planes.
Radar, the atomic bomb, tanks, bombers, new dogfighting planes, and new weapons
Guns and swords.
Weapons and carved stone
Weapons/military sales
Treat all weapons as if they are loaded.
Germany did