welsh oral exam and needs ideas!?

hi
i have a welsh oral exam in a month and i have to talk for 5 minutes about a particular subject. It needs to have 5 points. For example,
Subject: First World War
point 1. why did it start?
point 2. who was involved?
point 3. the life as a soldier?
point 4. how did it effect the country/welsh language?
point 5. how did it end?

so i'm stuck thinking of a subject, i dont want the common ones like obesity, anorexia, credit crunch etc.
any ideas?!