Pre-Constitutional Era (2011)
- 18 October 2011: Osiris is founded by Testlandia.
- 19 October 2011: Wordy (Sichuan Pepper) is elected the first Delegate of Osiris. First official forum of Osiris is created by Zaolat.
- 28 October 2011: Zaolat is elected the first, pre-constitutional Pharaoh of Osiris.
- 30 October 2011: Zaolat creates the Osiran Guard as the first military of Osiris, neutral in alignment.
- 18 November 2011: The Book of the Dead passes by a vote of 27-0, becoming the first regional constitution and establishing the Kemetic Republic of Osiris.
Kemetic Republic of Osiris (2011-2013)
- 20 November 2011: A coup attempt by Frak (Knights of the Round Fable) is thwarted by Zaolat.
- 24 November 2011: Dalimbar is elected the first constitutional and second overall Pharaoh of Osiris.
- 16 January 2012: Kai Repat Oliver (Oliver the Mediocre) is named Acting Pharaoh, thwarts coup attempt by JAL/Durk (Bachman-Turner Overdrive).
- 19 January 2012: Oliver signs the Pan-Sinker Security Pact, a mutual defense treaty with Balder, Lazarus, and the Rejected Realms.
- 02 February 2012: Dalimbar is automatically removed from office after his nation ceases to exist.
- 10 February 2012: With the incumbent Acting Pharaoh not seeking election, Earth (Lyanna Stark) is elected the fourth Pharaoh of Osiris.
- 21 February 2012: The Medjai Guard, initially neutral in alignment, is created by Mad Jack with the approval of Earth.
- 09 March 2012: Earth signs a mutual defense treaty between Osiris and the South Pacific.
- 10 June 2012: Earth signs a mutual defense treaty between Osiris and The North Pacific.
- 26 July 2012: Earth declares a new imperial theme for Osiris, announces independent alignment for the Medjai Guard.
- 26 September 2012: Earth signs the Osiris-Equilism Friendship and Mutual Defense Accord.
- 14 October 2012: Biyah resigns as Kai Repat, marking the beginning of factional civil conflict that will last for months.
- 17 October 2012: Earth signs Articles VI and VII of the Pan-Sinker Security Pact requiring signatories to expel anyone who attacks another signatory.
- 21 October 2012: Earth resigns and is succeeded by Kai Repat Mad Jack, the fifth Pharaoh of Osiris.
- 29 December 2012: Neo Kervoskia perpetrates a coup on behalf of the Empire and former Gatesville members.
- 30 December 2012: Mad Jack is restored to the Delegacy after the Empire/Gatesville coup, initially intended to be long-term, is aborted.
- 31 December 2012: Mad Jack pardons Empire/Gatesville conspirators due to legal loopholes that will make treason convictions impossible.
- 24 January 2013: Mad Jack signs the Bilateral Oasis-Osiris Treaty between Osiris and Antarctic Oasis.
- 08 February 2013: Osiris co-founds Sovereign Confederation, an interregional alliance formed with Equilism, Gatesville Inc, the Pacific, and later Unknown.
- 20 April-30 April 2013: Osiris opposes Milograd's coup of ally the South Pacific, creating conflict with allies Gatesville Inc and the Pacific.
- 24 April 2013: Mad Jack resigns and is succeeded by Kai Repat Treize Dreizehn (The Dourian Embassy), the sixth Pharaoh of Osiris.
- 02 June 2013: Secretary General Astarial announces the dissolution of Sovereign Confederation due to conflict between member regions.
- 18 June 2013: Lemon Love, longtime citizen and candidate for Pharaoh, is identified as Jakker, a sleeper agent of The Black Hawks.
- 27 June 2013: Cormac (Cormac A Stark) is elected the seventh Pharaoh of Osiris, defeating incumbent Treize Dreizehn.
- 28 June 2013: Treize Dreizehn, backed by Gatesville Inc, falsely claims election fraud and perpetrates a coup. Osiris declares war on Gatesville Inc.
- 29 July 2013: Peace agreement is reached with Gatesville Inc, bringing Treize Dreizehn's coup to an end.
- 30 July 2013: Osiris voids peace agreement, Acting Delegate Diamete (Sentimental Journey) ejects and bans Treize Dreizehn.
- 14 August 2013: Cormac signs repeal of the defunct Bilateral Oasis-Osiris Treaty and Sovereign Confederation Charter in the aftermath of the coup.
- 22 August 2013: Cormac signs the Osiris-Balder Sister Sinker Treaty, replacing the Pan-Sinker Security Pact from which Osiris withdrew on 30 July 2013.
- 16 September 2013: Cormac resigns amidst personal issues and is succeeded by Kai Repat Astarial (Detective Figs), the eighth Pharaoh of Osiris.
Osiran Reformation (2013)
- 16 September 2013: Astarial extralegally dissolves the Kemetic Republic of Osiris with broad community support.
- 19 September 2013: The Sekhmet Legion, raider in alignment, is created by Cormac with the approval of Astarial.
- 20 September 2013: The Sekhmet Legion engages in its first operation, a tag run with nineteen regions successfully tagged.
- 24 September 2013: The Sekhmet Legion raids Soviet Union, at the time a member region of the Founderless Regions Alliance.
- 24 September-19 November 2013: The Empire and prominent defenders in Osiris conspire to bring down Astarial's government.
- 24 October-15 November 2013: The Sekhmet Legion raids and refounds Islamic Republics of Iran for its position in update.
- 19 November 2013: Astarial resigns and is succeeded by Grand Vizier Venico, the ninth Pharaoh of Osiris.
- 19 November-10 December 2013: Venico, Koth, and Cormac plan to create a new government and expel the anti-Astarial conspirators from Osiris.
- 29 November 2013: Second official forum of Osiris is created by Cormac.
First Era of the Osiris Fraternal Order (2013-2016)
- 10 December 2013: Koth (Detective Figs) becomes Co-Pharaoh of Osiris with Venico, making him also the ninth Pharaoh of Osiris.
- 10 December 2013: The Brotherhood of Malice places Osiris under its protection. The pre-constitutional Osiris Fraternal Order is established.
- 18 January 2014: The State Code of Osiris is signed by Venico and becomes the second constitution of Osiris, having passed by a vote of 15-0.
- 23 January 2014: Venico signs the Fraternal Treaty of Thebes, a mutual defense treaty between Osiris and The New Inquisition.
- 24 January 2014: With none of the OFO co-founders seeking election, Joshua Ravenclaw (the Imperial Crown) is elected the tenth Pharaoh of Osiris.
- 12 March 2014: Joshua Ravenclaw signs the Mediterranean Accord, a mutual defense treaty between Osiris and Albion.
- 20 April 2014: Joshua Ravenclaw resigns and is succeeded by Vizier Joshua Bluteisen (Ikand), the eleventh Pharaoh of Osiris.
- 22 April 2014: Joshua Bluteisen signs the Treaty of Maxonberg, a mutual defense treaty between Osiris and The Land of Kings and Emperors.
- 27 April 2014: With the incumbent Pharaoh not seeking election, Severisen (Detective Figs) is elected the twelfth Pharaoh of Osiris.
- 27 April 2014: Severisen signs the Treaty of the Old Gods, a bilateral joint military alliance between Osiris and Balder.
- 27 April 2014: Severisen signs the Treaty of Alexandria, a mutual defense treaty between Osiris and Europeia.
- 31 May 2014: Severisen signs The East Pacific-Osiris Treaty of Amity, a mutual defense treaty between Osiris and The East Pacific.
- 09 June 2014: Severisen signs the Third Monarchist Treaty, a cultural treaty between Osiris and ten other monarchist regions.
- 09 June 2014: Severisen signs the Non-Aggression Pact between Osiris and the Rejected Realms.
- 27 July 2014: With the incumbent Pharaoh not seeking reelection, Cormac is elected the thirteenth Pharaoh of Osiris.
- 28 August 2014: The Deshret declares war against the People's Republic of Lazarus at the request of Cormac.
- 20 September 2014: Cormac signs the Treaty of Tatooine, a mutual defense treaty between Osiris and The New Galactic Empire.
- 26 September 2014: Cormac resigns and is succeeded by Vizier Treize Dreizehn, the fourteenth Pharaoh of Osiris.
- 29 September 2014: Treize Dreizehn signs repeal of the Non-Aggression Pact between Osiris and the Rejected Realms.
- 04 October 2014: With the incumbent Pharaoh not seeking election, Joshua Bluteisen is elected the fifteenth Pharaoh of Osiris.
- 12 October 2014: The Deshret repeals the declaration of war against the People's Republic of Lazarus at the request of Joshua Bluteisen.
- 04 October 2014: Joshua Bluteisen signs an amendment to the Treaty of the Old Gods, reducing it to a mutual defense treaty with joint intelligence.
- 04 January 2015: With the incumbent Pharaoh not seeking reelection, Tim Stark is elected the sixteenth Pharaoh of Osiris.
- 23 February 2015: Tim Stark signs a second Non-Aggression Pact between Osiris and the Rejected Realms.
- 05 March 2015: Tim Stark signs repeal of the Third Monarchist Treaty due to inactivity of several treaty signatories.
- 22 March 2015: Tim Stark signs an amendment to the Treaty of the Old Gods, reducing it to a mutual defense treaty.
- 08 April 2015: Osiris opposes Stujenske's coup of Lazarus, once again bringing Osiris into conflict with former ally the Pacific.
- 14 June 2015: Tim Stark signs a Non-Aggression Pact with Lazarus, following its liberation and reforms to its government.
- 06 July 2015: With the incumbent Pharaoh not seeking reelection, Koth (Saq) is elected the seventeenth Pharaoh of Osiris.
- 06 October 2015: With the incumbent Pharaoh not seeking reelection, Festavo (Trick Shot) is elected the eighteenth Pharaoh of Osiris.
- 05 January 2016: With the incumbent Pharaoh not seeking reelection, Tim Stark is elected the nineteenth Pharaoh of Osiris.
- 14 April 2016: Following a divisive election fraught with irregularities, The Almighty Jesus Whale is purportedly elected the twentieth Pharaoh of Osiris.
Transitional Government of the Osiris Fraternal Order (2016)
- 18 April 2016: Tim Stark invalidates the election of The Almighty Jesus Whale and dissolves the State Code of Osiris.
- 18 April 2016: Tim Stark resigns, succeeded by his appointed successor, Cormac (Cormactopia II), the twentieth Pharaoh of Osiris.
- 18 April 2016: Cormac establishes the Transitional Government of the Osiris Fraternal Order with Tim Stark, Koth, and Joshua Bluteisen.
- 25 April 2016: Cormac voids the Mediterranean Accord with Albion and the Non-Aggression Pact with Lazarus in response to support for the April rebellion.
- 16 May 2016: The Scroll of Ma'at is granted assent by Cormac and becomes the third constitution of Osiris, having passed by a vote of 11-0.
Second Era of the Osiris Fraternal Order (2016-)
- 31 May 2016: Cormac grants assent to repeal of the Treaty of Alexandria following repeal of the treaty by Europeia.
- 31 May 2016: Cormac grants assent to repeal of the Fraternal Treaty of Thebes and the Treaty of Tatooine due to the inactivity of the other signatories.
- 25 July 2016: Cormac grants assent to the Treaty of Lycopolis, a mutual defense treaty between Osiris and Lone Wolves United.
- 25 August 2016: Cormac grants assent to the Treaty of the Ancient Gods, a mutual defense treaty with Balder to replace the Treaty of the Old Gods.
- 31 October 2016: Cormac grants assent to the Coalition Against the Ideology of Nazism, enrolling Osiris in an interregional organization to combat Nazism.
- 13 November 2016: Cormac grants assent to the Treaty of the Occident, a mutual defense treaty between Osiris and the West Pacific.
- 16 November 2016: Cormac abdicates and is succeeded by Heir Apparent Neo Kervoskia, the twenty-first Pharaoh of Osiris.
- 26 December 2016: Neo Kervoskia grants assent to the GCR Sovereignty Accords, a mutual defense treaty with Balder, the Pacific, and the West Pacific.
- 06 January 2017: Neo Kervoskia grants assent to constitutional reforms that dramatically reduce the role of the Pharaoh in government.
- 06 May 2017: The Council of Scribes declines to ratify amendments to the CAIN treaty, withdrawing Osiris from CAIN.
- 01 August 2017: Neo Kervoskia grants assent to repeal of the GCR Sovereignty Accords due to conflict with the Pacific.
- 01 August 2017: Neo Kervoskia abdicates and is succeeded by Crown Prince Syberis, the twenty-second Pharaoh of Osiris.
- 15 September 2017: Syberis grants assent to The North Pacific and Osiris Non-Aggression Pact.
- 19 October 2017: Syberis grants assent to an amendment to the Scroll of Ma'at allowing for a Constitutional Convention to be called.
- 29 October 2017: Syberis grants assent to the calling of the 2017 Constitutional Convention.
- 05 December 2017: The Scroll of Horus is granted assent by Syberis and becomes the fourth constitution of Osiris, having passed by a vote of 16-0.
- 14 January 2018: The Council of Guardians approved the Treaty of Anubis with Europeia.
- 13 April 2018: The Council of Guardians repealed the Treaty of Lycopolis with Lone Wolves United.
- 25 May 2018: Syberis abdicates and is succeeded by Heiress apparent Altinsane, the twenty-third Pharaoh of Osiris.
- 14 September 2018: The Council of Guardians repealed the Treaty of Anubis with Europeia.
- 31 October 2018: The Council of Guardians repealed the Treaty of Maxonberg with the Land of Kings and Emperors.
- 25 November 2018: The Council of Guardians approved the Treaty of Selene with The Empire of Mare Nostrum.
- 30 November 2018: Osiris declares war on The New Pacific Order passing the Council of Guardians unanimously.
- 26 February 2019: Altino rules the Treaty of Amity with The East Pacific void because the treaty was not renegotiated by the transitional government of Osiris.
- 18 January 2019: The Council of Guardians Approved the Treaty of the Sun with Lazarus.
- 8 March 2019: Altino grants assent to the Power Transfer Amendments Act transferring many powers from the Council of Guardians to the Council of Scribes.
- 31 March 2019: Altino abdicates and is succeeded by Heiress Apparent Ghostfox, the twenty-fourth Pharaoh of Osiris.
- 12 April 2019: Lynxi grants assent to the Lost and Found accords with The Rejected Realms
- 12 June 2019: Lynxi abdicates and is succeeded by Heiress Apparent Anabelle I the twenty-fifth Pharaoh of Osiris.
- 17 June 2019: Anabelle grants assent to the Treaty of the Anti-Pacific Coalition
- 03 January 2020: Anabelle grants assent to the Treaty of the Oasis with Thalassia
- 27 January 2020: Anabelle grants assent to the Treaty of Tranquillity with The East Pacific
- 5 April 2020: Anabelle abdicates and is succeeded by Heiress Apparent Rigels Light the twenty-sixth Pharaoh of Osiris