4. Machine guns were introduced in World War I They led to the stale mate on the Western Front The militaries did not know how effective they were and led to horrendous casualties.

5. Air Combat was just being introduced during the war. The Red Baron was the more famous World War I flying ace for Germany The United States did have some competition for the Red Baron, his name was Eddie Rickenbacker

6. Poison gas was introduced by the Germans It was difficult to control because you had to depend on the wind direction for it to be effective. If you experienced poison gas it usually led to a slow and painful death Some effects were: blindness, swelling of the throat, paralysis and skin burns.

7. Style of combat used during World War I. First used on the Western front following a stalemate between the Allied and Central Powers. New Technology combined with traditional military tactics led to a long and drawn out period of fighting.

8. DIAGRAM OF A FRONT LINE TRENCH Notice the trench lines are not straight lines. Why?

10. Trench Foot