Dated events from published cases, in chronological order. Dates keep their real precision; a period filter includes any event whose date range overlaps it.
16 events.
· Conflict episode
The IRA waged a guerrilla war against British Crown forces from January 1919 to the July 1921 truce; published casualty figures vary, with roughly 491 IRA and 506 Crown Force deaths cited alongside 919 civilian deaths logged across the wider 1917-1921 period.
In: Ireland
· Declaration
A short-lived, unrecognized Ingrian Finnish breakaway state on the Karelian Isthmus, ended by the Treaty of Tartu.
In: Ingria
· Declaration
A short-lived unrecognized monarchy under Uzun-Hajji claiming authority over Dagestan and the wider North Caucasus during the Russian Civil War.
· Agreement
South Africa received a League of Nations mandate over South West Africa on 17 December 1920 and, after refusing to place the territory under UN Trusteeship following the Second World War, continued to administer it; the International Court of Justice ruled in 1971 that this continued occupation was illegal.
In: Namibia
· Constitutional change
The Polish Sejm granted the newly formed Silesian Voivodeship a broad autonomy statute, including its own parliament.
· Agreement
The peace treaty with the Ottoman government provided for Kurdish local autonomy and a conditional route to independence; it never took effect.
· Other
A Naqshbandi-led uprising against Soviet rule that briefly controlled much of mountainous Dagestan before being suppressed.
· International resolution
The League Council awarded sovereignty over Åland to Finland, conditioned on guarantees for Swedish language and culture and on demilitarisation.
In: Åland Islands
· Declaration
Abd el-Krim declared an independent Republic of the Rif, defeated five years later by French and Spanish forces.
· Agreement
British and Irish delegations signed the Articles of Agreement for a Treaty between Great Britain and Ireland in London on 6 December 1921, ending the Irish War of Independence and providing for the Irish Free State as a self-governing dominion.
In: Ireland
· Declaration
Sheikh Mahmud Barzanji declared a Kingdom of Kurdistan around Sulaimaniyah under British-administered Iraq; it was unrecognised and suppressed.
· Conflict episode
A civil war between pro-Treaty and anti-Treaty forces followed the Treaty's ratification, lasting from June 1922 to May 1923; academic research has documented 1,426 violent deaths in the twenty-six counties of the Free State.
In: Ireland
· Declaration
The Constitution of the Irish Free State came into legal effect on 6 December 1922, one year after the Treaty was signed, establishing the Irish Free State as a self-governing dominion.
In: Ireland
· Other
A Cayuga statesman travelled internationally on a Haudenosaunee-issued passport to assert sovereignty before an international body.
· Other
Iranian central government forces subjugated the autonomous Emirate of Muhammara, ending over a century of local Arab self-government in what is now Khuzestan province.
· Other
Repeated waves of Soviet deportation and persecution reduced the Ingrian Finn population from roughly 150,000 to around 50,000 between the late 1920s and 1939, continuing through the 1940s.
In: Ingria