Help me please I am a student.

Hello I am a 15 year old student at Ridley College in Ontario Canada. I have been assigned a project on the importance of combat aircraft in World War one. Ultimately I would just like a bit of help from all of you who seem to be aviation buffs to create my thesis statement or rather just a few points to base my essay on. I have thought so far of aircraft that were used effectively for reconnaisance, for dog fights, anti-tank machines, anti balloon craft and other tactical advantages of having air support on the battle field. Please tell me the things I missed. I would greatly appreciate any help you could provide.