| Unit Name: | 131 Air Defence Regiment |
| Dates: | 1968 – present |
| Country: | India |
| Allegiance: | India |
| Branch: | Indian Army |
| Type: | Corps of Army Air Defence |
| Size: | Regiment |
| Equipment: | 40 mm L/70 |
| Identification Symbol: | 131 AD Regt |
| Identification Symbol Label: | Abbreviation |
| Nickname: | “The Only Ones” |
| Motto: | Sanskrit Sanskrit: आकाशे शत्रुन् जहि |
| Colors: | Sky Blue and Red |
131 Air Defence Regiment is an Air Defence regiment of the Indian Army.
The regiment was raised on 24 September 1968 as a territorial army regiment at Siliguri, West Bengal.[1] [2]
At the time of its formation, the Regiment was equipped with Bofors 40 mm L-60 anti-aircraft guns, it had inherited from 106 Heavy Anti Aircraft Territorial Army. On 15 September 1973, the regiment was converted into a regular air defence regiment. In due course, it was equipped with the 40 mm L/70 gun and the Super Fledermaus radar.[1] It presently also has the Flycatcher (KL/MSS-6720) radar system and the Tactical Control Radar (TCR).
The regiment has taken part in the following operations-[1] [2]
It provided air defence protection to 16 Field Ammunition Depot, Bagdogra Airfield, 33 Corps Signal Centre, Shahbad signal unit and other locations.
It provided cover to Ammunition Supply Depot and Mirthal bridge between January and May 1987.
The regiment aided civil authority during the Mumbai riots (Operation Vyavastha) in December 1992.
Various subunits provided air defence protection from May 1999. The unit was repositioned in the order of battle with 785 (Independent) Air Defence Brigade from July 1999 in the 2 Corps zone.
Subunits provided air defence protection between December 2001 to December 2002 to Headquarters 10 Corps, Corps Logistics Node North, Corps Logistics Node South, Bhatinda railway station and Ammunition Depots.
One column of the unit was mobilised to cordon Hotel Taj at Mumbai, after the terrorists stuck and took people hostage.[3]
Subunits of the regiment were deployed in counter insurgency operation in Jammu and Kashmir between August 1993 and December 1995 and again between August 2015 and July 2017.