Very cool idea!
But... just for accuracy's sake.. XD
1918 was actually the year the war ended.... At least towards the end of the year.
I'm from Vienna, I should know these things XD

It's the year the Austrian Monarchy collapsed for good, Hungary, Czechoslovakia and Yugoslavia (the latter both now being split up into the modern eastern European countries) had proclaimed their independence already and in November that year the Republic of Austria was proclaimed November 11th (had to check up on that haha I obviously didn't know the exact date by heart).

It was a pretty significant year for us Austrians.. :P