Jasenovac is a village and a municipality in Croatia, in the southern part of the Sisak-Moslavina County at the confluence of the river Una into Sava. The name means "ash wood" or "ash forest" in Croatian, the area being ringed by such a forest.
During the World War II, it was the site of the Jasenovac concentration camp.
Wikipedia https://en.wikipedia.org/wiki/Jasenovac,_Sisak-Moslavina_County
Coordinates 45°16'15.52" N 16°54'39.502" E