There was not just one cause for the war. Many factors started a "snowball effect" causing the start of the war. Improvements in economics and power around the world, sparked countries to become jealous of each other. Immediately countries formed their alliances. New styles of war fare were also introduced to this war such as the use of gas, and new heavy weapons.
- Machine Guns- became very popular at this time, were attatched to ships, air crafts, and used on land for mass distruction.
- Poisonous Gas- did not kill instantly, but made death slow and awful, was very popular and very deadly.
- Tanks- improved as the wars went on, became a bigger and more safe way to travel and attack.
- Airplanes- became and popular and easy way to attack from over head and made it easier for traveling.
The use of airplanes became a huge factor in this war.
Used to take out people and draw out deaths.
Used to stay safe and travel