meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
World War I
World War I was remembered by prolonged trench warfare. Military technology had increased significantly with the machine gun and artillery guns. This led to both sides “digging in” and practicing defensive strategies. This photo shows soldiers firing a machine gun during World War I - can you find the three differences in this photo hunt puzzle?
World War I also was the first war where chemical weapons were used. Mustard gas was developed by the Germans, and later both sides used the weaponry.