You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Your challenge if you choose to accept it is to create a war between France and Prussia earlier than OTLs within the time frame between 1860 to 1869 preferably. You may choose any POD to create the events which lead to war that you like. As well if you desire you may write about how you think that war would conclude.
Personaly though I'd like to look at situations in which France is still the instigatorof an earlier FPW so feel especially free to discuss that.