4th/6th Battalion, Ulster Defence Regiment

{{Short description|Military unit}}

{{See also|Ulster Defence Regiment}}

{{See also|List of battalions and locations of the Ulster Defence Regiment}}

{{Use dmy dates|date=March 2020}}

{{EngvarB|date=March 2020}}

{{Infobox military unit

|unit_name= 4th/6th (County Fermanagh & Country Tyrone) Battalion, Ulster Defence Regiment

|image=Insignia of the Ulster Defence Regiment.svg

|caption= Regimental Insignia

|dates= 1991–1992

|country={{flag|United Kingdom}}

|branch= {{flagicon image|Flag of the British Army (1938-present).svg}}British Army

|type= Infantry battalion

|role= Internal Security

|size= 750

|current_commander=

|garrison=Lisburn

|garrison_label=Regimental Headquarters

|identification_symbol=

|identification_symbol_label=

|identification_symbol_2=

|identification_symbol_2_label=

|march=(Quick) Garryowen & Sprig of Shillelagh.
(Slow) Oft in the Stilly Night

|anniversaries=

|motto= "Quis Separabit" ({{small|Latin}})
"Who Shall Separate Us?"

|commander1= First: General Sir John Anderson GBE, KCB, DSO.

Last: General Sir Charles Huxtable, KCB, CBE, DL

|commander1_label= Colonel Commandant

|commander2=Colonel Sir Dennis Faulkner CBE

|commander2_label=Colonel of the Regiment

}}

The 4th/6th (County Fermanagh and County Tyrone) Battalion, Ulster Defence Regiment was formed in 1991 as a result of an amalgamation between the 4th Battalion, Ulster Defence Regiment and the 6th Battalion, Ulster Defence Regiment. The resultant 4/6 UDR was subsumed into the Royal Irish Rangers in 1992 as part of the amalgamation which formed the Royal Irish Regiment.