Go to the link provided for A global guide to the first world war. Scroll down a little until you see the big yellow circle, click enter, once you have entered go to the bottom of the screen where the number bar is, go to part 2 trenches, view it and write a summary and reaction. Do the same for part 3, Empires and part 7, Aftermath. Write you reactions to all three here. Clearly label them. The first paragraph should include your introduction.