Complex sentence: During the Croatian War of Independence (1991--1995), Dvor was within the breakaway Republic of Serbian Krajina, but following Operation Storm in 1995 the municipality returned to Croatian control.
Split into simpler sentences: During the Croatian War of Independence (1991-1995), Dvor was a town of the breakaway Republic Serbian Krajina. After Operation Storm in 1995 the municipality was returned to Croatian control.