Question: What operation was thwarted by a brigade of about 40 members?

Context paragraphs:
Nesting (voting districts): "Nesting" is the delimitation of voting districts for one elected body in order to define the voting districts for another body.  For example, in California, the State Assembly (the lower house) is composed of 80 members, each one representing 1/80th of California's population, and the State Senate (the upper house) is composed of 40 members, each one representing 1/40th of California's population.  In this case, the process of nesting could either be first defining the 80 Assembly districts, and then defining the Senate districts as a merge of two Assembly districts, or first defining the 40 Senate districts, and then creating the Assembly districts by splitting each Senate district into two.  If the Assembly districts and the Senate districts are created independently of each other, then the process of nesting is not used.

Provisional IRA South Armagh Brigade: 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.

10th Mountain Assault Brigade (Ukraine): The brigade was formed on 30 October 2015 in Koloymia, part of Operation Command West.  It included the 24th Separate Assault Battalion, the former Aidar Battalion.  The brigade is commanded by Colonel and Hero of Ukraine Vasyl Zubanych, a former battalion commander in the 128th Mechanized Brigade.  According to Zubanych in an interview at the time, the brigade will be deployed to the Donbass if necessary in a war with Russia.  The main purpose of the brigade at the time was to protect Bukovina from Romanian territorial claims.  The first group of recruits were 1,000 volunteers on a contract basis.  There initially was a 25% pay increase offered to recruits, as recognition of their status as mountain troops.  In January 2016, it was reported by the Ukrainian Ministry of Defence that the brigade was ready to begin combat training.  As of January 2016 the brigade was stationed at Bila Tserkva pending completion of new barracks in Kolomyia.  In February 2016, it was decided by the Ukrainian Ground Forces to form a new Bukovina mountain battalion at Chernivtsi.  The 8th Separate Motorized Infantry Battalion and the 46th Separate Special Purpose Battalion "Donbass-Ukraine" also became part of the brigade.  The 8th Motorized Infantry, the 24th Assault, and the 46th Separate Special Purpose Battalion formed the entirety of the brigade, consisting of a few thousand men.

80th Airmobile Brigade (Ukraine): The 80th Airmobile Brigade (Ukrainian: 80-та окрема аеромобільна бригада ; Military Unit Number A0284) is an airmobile formation of the Ukrainian Ground Forces.  The brigade is part of Operation Command West.  The brigade traces its history back to the 80th Airborne Regiment, formed in 1955 as part of the Soviet airborne's 7th Guards Airborne Division.  Four years later, the regiment transferred to the 104th Guards Airborne Division.  It participated in Operation Whirlwind in 1956 and Operation Danube in 1968.  In 1979, the regiment was disbanded and used to form the 39th and 40th Separate Air Assault Brigades of the Soviet Army.  The 39th Separate Air Assault Brigade became the 224th Training Center after transfer back to the Soviet airborne in 1990.  The training center was taken over by Ukraine in 1992 with the dissolution of the Soviet Union and became the 6th Separate Airmobile Brigade in 1995.  In 1999, the brigade was reorganized into the 80th Airmobile Regiment, part of the 13th Army Corps.  In 2013, the regiment was upgraded and became a brigade.  The brigade fought in the War in Donbass.

3rd Brigade Combat Team, 10th Mountain Division: The 3rd Brigade Combat Team, 36th Infantry Division is an infantry brigade combat team of the United States Army based at Fort Polk, Louisiana.  It has the lineage of the 10th Mountain Division, but now wears the patch of the 36th Infantry Division through the associated unit program.  Since its activation in 2004, the brigade has deployed four times to Afghanistan in support of Operation Enduring Freedom.  In 2014, the brigade inactivated at Fort Drum, NY, and its infantry battalions were reassigned to other brigades while its special troops battalion, field artillery battalion, brigade support battalion and cavalry squadron were inactivated.  The brigade reactivated at Fort Polk, LA in 2015 by reflagging the assets of the 4th Brigade Combat Team, 10th Mountain Division, which was inactivated.  The infantry, cavalry and field artillery battalions of the 4th Brigade were reassigned to the 3rd Brigade.

56th Guards Air Assault Brigade: The 56th Separate Guards Air Assault Brigade was formed on 1 October 1979 in Chirchiq from the disbanded 105th Guards Airborne Division's 351st Guards Airborne Regiment.  The new brigade inherited battle honors from that unit.  On 13 December, the brigade was transferred to Termez in preparation for deployment to Afghanistan.  On 27 December, the brigade's 4th Airborne Battalion crossed the Afghan border and secured Salang Pass.  The 3rd Air Assault battalion was airlifted by helicopter into Afghanistan and captured Rabat-Mirza-Kushka Pass on the next day.  Between 13 and 14 January 1980, the brigade crossed the border and concentrated at Kunduz.  At the same time, the 3rd Air Assault Battalion moved to Kandahar.  In February, the 4th Airborne Battalion was transferred to Charikar but was moved back to Kunduz in the same year.  The 2nd Air Assault Battalion was attached to the 70th Separate Motorized Rifle Regiment in March.  In December 1982, the brigade was moved to Gardez.  The brigade was reequipped with the BMP-2 infantry fighting vehicle in 1985.  On 5 April, it was awarded the Order of the Patriotic War 1st class.  It fought in Operation Magistral from December 1987 to January 1988.  In June 1988, the brigade crossed the border back into Turkmenistan during the Soviet withdrawal from Afghanistan.  After its return from Afghanistan, the brigade was based in Ýolöten.

Operation Conservation: Operation Conservation was a British Army attempt 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.  The operation was uncovered and thwarted by the IRA South Armagh Brigade.

Operation Attleboro: Operation Attleboro was a Vietnam War search and destroy operation by the 196th Light Infantry Brigade with the objective to discover the location(s) of the North Vietnamese or Viet Cong base areas and force them to fight.  The operation was named after Attleboro, Massachusetts, where the brigade had been formed.  Operation Attleboro turned out to be the largest series of air mobile operations to that time, involving all or elements of the 196th Light Infantry Brigade, 25th Division, 1st Infantry Division, and a brigade of the 4th Division, as well as numerous Army of the Republic of Vietnam and Regional Forces/Popular Forces and Nungs.  In the end, the operation became a corps operation commanded by II Field Forces.

Elections in Bahrain: The National Assembly is bicameral with the lower house, the Chamber of Deputies, having 40 members elected in single-seat constituencies for a four-year term.  The upper house, the Shura Council, has 40 members appointed by the King of Bahrain, with the stated aim of giving a voice to minority communities and technocratic experts within the legislative process.  Supporters of the system refer to long established democracies the United Kingdom and Canada operating with this bicameralism with an appointed upper chamber and an elected lower chamber.  Opponents of this system point out that unlike the bicameral systems in the UK and Canada, the Bahraini system gives the unelected upper house equal or more legislative power than the elected lower house, allowing the King to control all legislation.  Opponents also point out that the current system was imposed unilaterally by the King, violating the and a 2001 signed agreement with the Bahraini opposition.

Alaska Legislature: The Alaska Legislature is the state legislature of the U.S. state of Alaska.  It is a bicameral institution, consisting of the lower Alaska House of Representatives, with 40 members, and the upper house Alaska Senate, with 20 members.  There are 40 House Districts (1-40) and 20 Senate Districts (A-T).  With a total of 60 lawmakers, the Alaska Legislature is the smallest bicameral state legislature in the United States and the second-smallest of all state legislatures (only the 49-member unicameral Nebraska Legislature is smaller).  There are no term limits for either chamber.

Supporting paragraphs: Operation Conservation Provisional IRA South Armagh Brigade
Answer: Operation Conservation