WW1

1. Causes:

1.1. assassination of Austrian Archduke

1.2. Militarism

1.3. mutual defense alliances

1.4. imperalism

1.5. Nationalism

2. Important battles:

2.1. battle of Tanneberg(1914)

2.2. battle of Verdun (1916)

2.3. battle of Cambrai (1917)

3. New warfare advancments:

3.1. Gas masks

3.2. Machine Guns

3.3. Tanks

3.4. Trench warfare