Question: Which party involved in The Battle of Lenadoon emerged in December 1969?

Context paragraphs:
Credit card roulette: Credit Card Roulette is a game of chance where every party involved contributes their own credit or debit card into a hat or billfold.  The waitress or waiter will choose at random the card which will pay the entire bill.  A second version of the game is played where the waiter or waitress pulls one card at a time and the last card picked pays the bill.  Some groups may take the losers from previous meals that day out of contention for later that evening's game of chance.  Exemptions are not accepted outside the 24-hour statute of limitation grace period.

West Dunbartonshire Community Party: The West Dunbartonshire Community Party is a minor political party involved in local government elections in West Dunbartonshire, Scotland.  The party was formed in 2016 to fight the 2017 West Dunbartonshire Council election.

Non-state transfers: In arms sales and black market activities, non-state transfers are transactions of weapons or other goods - material or non-material - where neither party involved is a government.  This is in contrast to the usual practice of arms sales, where a government purchases arms from another government or from private industry.  This is also in contrast to situations where a government may provide arms to a non-state actor, such as a separatist movement or terrorists.

Borders Party: The Borders Party is a political party involved in Local Government in one part of Scotland.  The party returned two councillors to the Scottish Borders Council in 2007 and again in 2012.  Although they did not field candidates in 2017, the party is still registered with the Electoral Commission

Declaratory judgment: A declaratory judgment, also called a declaration, is the legal determination of a court that resolves legal uncertainty for the litigants.  It is a form of legally binding preventive adjudication by which a party involved in an actual or possible legal matter can ask a court to conclusively rule on and affirm the rights, duties, or obligations of one or more parties in a civil dispute (subject to any appeal).  The declaratory judgment is generally considered a statutory remedy and not an equitable remedy in the United States, and is thus not subject to equitable requirements, though there are analogies that can be found in the remedies granted by courts of equity.  A declaratory judgment does not by itself order any action by a party, or imply damages or an injunction, although it may be accompanied by one or more other remedies.

Small house (Zimbabwe): Small House is a Zimbabwean expression describing an extramarital affair or a party involved in one.  It usually describes girlfriends of a married male, a reflection of the polygamous history of the country.  Because of Zimbabwe's economic hardships, many men have been forced to abandon costly multiple relationships, which has led to a significant drop in the country's HIV rate in recent years.

Sohan Singh Bhakna: Baba Sohan Singh Bhakna(in Punjabi ਸੋਹਣ ਸਿਂਘ ਭਕਨਾ) (1870–1968) was an Indian revolutionary, the founding president of the Ghadar Party, and a leading member of the party involved in the Ghadar Conspiracy of 1915.  Tried at the Lahore Conspiracy trial, Sohan Singh served sixteen years of a life sentence for his part in the conspiracy before he was released in 1930.  He later worked closely with the Indian labour movement, devoting considerable time to the Kisan Sabha and the Communist Party of India.

Battle of Lenadoon: The Battle of Lenadoon was a series of gun battles fought over six days between the Provisional IRA and the British Army, having started on Thursday, 9 July 1972 in and around the Lenadoon Avenue area and spreading to other places in Belfast.  Loyalist paramilitaries and the Official Irish Republican Army were involved in some of the incidents.  There was 26 people killed in total & dozens injured making it one of the deadliest weeks of 1972 during the conflict.  With almost 500 people killed, 1972 was the deadliest year of the conflict in Ireland known as The Troubles.  It was as bad as any year since political violence broke out in Ulster during the Anglo-Irish War in the 1920s.  These gun battles started after a two-week truce between the British Army and the IRA ended.

Publicly Verifiable Secret Sharing: In cryptography, a secret sharing scheme is publicly verifiable (PVSS) if it is a verifiable secret sharing scheme and if any party involved can verify the validity of the shares distributed by the dealer.

Official Irish Republican Army: The Official Irish Republican Army or Official IRA (OIRA) was an Irish republican paramilitary group whose goal was to remove Northern Ireland from the United Kingdom and create a "workers' republic" encompassing all of Ireland.  It emerged in December 1969, shortly after the beginning of the Troubles, when the Irish Republican Army split into two factions.  The other was the Provisional IRA.  Each continued to call itself simply "the IRA" and rejected the other's legitimacy.  Unlike the "Provisionals", the "Officials" were Marxist and worked to form a united front with other Irish communist groups, named the Irish National Liberation Front (NLF).  The Officials were called the NLF by the Provisionals and were sometimes nicknamed the "Red IRA" by others.

Supporting paragraphs: Battle of Lenadoon Official Irish Republican Army
Answer: the Official Irish Republican Army