Germany signs treaties with other nations after WWI.
All four countries [Austria, Bulgaria, Hungary and Turkey] had to pay reparations, they all had to disarm, and they all lost land.
The treaties also created new nation-states in Eastern Europe out of the old Austro-Hungarian Empire (per the principle of self-determination):
The treaties created new nation-states:
Czechs and Slovaks in Czechoslovakia
Hungarians in Hungary
Austrians in Austria
Poles in Poland
Slavs in Yugoslavia