Operation Conservation was an attempt by the British Army to ambush a large Provisional Irish Republican Army (IRA) unit along the Dorsey Enclosure, between Cullyhanna and Silverbridge, in south County Armagh. The action took place on 6 May 1990 but was thwarted by the South Armagh Brigade of the IRA.

The South Armagh Brigade of the Provisional Irish Republican Army (IRA) operated during the Troubles in south County Armagh. It was organised into two battalions, one around Jonesborough and another around Crossmaglen. By the 1990s, the South Armagh Brigade was thought to consist of about 40 members, roughly half of them living south of the border. It has allegedly been commanded since the 1970s by Thomas 'Slab' Murphy who is also alleged to be a member of the IRA's Army Council. Compared to other brigades, the South Armagh IRA was seen as an 'independent republic' within the republican movement, retaining a battalion organizational structure and not adopting the cell structure the rest of the IRA was forced to adopt after repeated intelligence failures.