In ancient Roman times, it was an area covered by marshes caused by the nearby
Volturno's floods. The town is mentioned for the first time in a bull by emperor
Frederick II of 1234, as
Graczanum. It was later populated by local vassals of the
Angevine kings of Naples and their feudataries. In 1303 it is mentioned as
Graczanisius. During
World War II, the area housed an airfield, which was repeatedly attacked by Allied bombers in August 1943 and from 4 to 6 September 1943. The
German occupied it in 1943, after the
Armistice between Italy and the Allies of 8 September 1943, expelling the Italian infantry division
"Pasubio". Some 100 people died during another bombing, aiming at a bridge on the Volturno, performed by American
B-26s in the night of 30 September 1943. The airport was captured by British troops in the following 10 October.
Grazzanise Air Base, with limited civil use serving Caserta, is now used by the Italian Air Force 9° Stormo Caccia (9th Fighters Wing) and the 2nd NATO Signal Battalion. In 1996–2000, the city's municipal council was disbanded by the Italian Ministry of Interior Affairs, due to
camorra presence in the local political affairs. ==Climate==