The 33^rd EW Regiment originated from the IRG Company constituted in 1956 for the 10^th Signals Battalion in Rome. In October 1958 a detachment of the company was constituted in Arzene (PN) for the interception and radiogoniometer in HF gamma.

In 1959 the company passed at the dependencies of the 9^th Signals Battalion located in Rome; two years later the detachment passed at the dependencies of the 32^nd Signals Battalion. On 19^th December 1969 the detachment was located at the "San Marco" Barracks in Conegliano (TV) and on 1^st September 1970 became independent as War Electronic Mixed Company.

On 5^th February 1975 the company, named 2^nd Mixed Company, with the 1^st ESM Company created the 33^rd "Falzarego" Electronic War Battalion, at the dependencies of the 5^th Territorial Military Command of the North-Eastern Military Region.

On 21^st March 1976 the Battalion received the War Flag. On 1^st March 1979 the Battalion passed at the dependencies of the Signals Command of the 5^th Army Corps.

In 1991 the Battalion was located in Treviso. On 1^st January 1996 the Battalion passed at the dependencies of the Command for the Information and the Electronic Defence of the Army, renamed C4-IEW of FOTER in September 1999.

On 1^st November 1998 the Battalion assumed the new name of 33^rd "Falzarego" IEW Battalion. On 28^th October 2002 the Unit became a Regiment and named 33^rd EW Regiment, with the "Falzarego" Battalion at its dependencies. Today the Regiment depends on the RISTA-EW Brigade.