The eastern part of the town of Gorizia , together with the upper Isonzo valley and the main part of Carso , were ceded to Yugoslavia in 1947 .
Trieste formed the Free Territory of Trieste .
The eastern part of the town of Gorizia , together with the upper Isonzo valley and the main part of Carso , were ceded to Yugoslavia in 1947 , while Trieste formed the Free Territory of Trieste .