I got the details muddled, I thought Franz Ferdinand stopped for a sandwich, but it was the person who shot him kicking off a chain of events that started the first World War who stopped for a sandwich, and on his way out spotted Franz Ferdinand and literally too his shot.
https://medium.com/weird-history/a-sandwich-sparked-a-war-th...
After asking my question I was wondering of you were not referring to the attempt to flee the country by Louis XVI (who was stopped at Varennes because he was recognized after chatting around instead of sitting still in the cart)
EDIT: OK, turns it it's not that easy to find. I saw it in a documentary from a pretty serious source [1]. Unfortunately for you, it's in French (there should be a German version too).
If you swoop in there and size power how are you going to lift the people out of poverty and not create the largest refugee crisis in history?