Verified Answer :

Dat the end of WW1. 

Prior to this alteration, Austria had incorporated Hungary into their empire (Austro-Hungarian Empire) and it was only after the Treaty of Versailles in 1919 that defeated Austria had to cede land to Hungary and Czechoslovakia.

Answer:

Austria was no longer part of the large Austro-Hungarian empire when that empire collapsed after the war.

Explanation: for the graded point