- February 13th: Poulsbo is subject to widespread nuclear bombardment by Principality of Regulus forces.
- April 2nd: Circinus is sterilized by Principality of Regulus forces via sustained thermonuclear bombardment.
- January 12th: Princess-Regent Yvonne Steiner-Davion cedes several border worlds to the nascent Republic of the Sphere.
- January 25th: Clan Diamond Shark begins a reorganization of the various outposts it controls.
- February 15th: Buena is recognized as the new capital world of the Alarion Province of the Lyran Alliance.
- March 7th-15th: The Republic of the Sphere formally comes into being as a nation.
- April 2nd: The Word of Blake's Jihad ends.
- April 2nd: The Circinus Federation ceases to exist as a nation.
- April 19th: The TCS Vendetta is formally ceded to the Calderon Protectorate and manned by a multinational crew.
- Inner Sphere worlds around Terra, except for Capellan holdings, join The Republic of the Sphere.
- Principes Guards created.
- Construction of the Sentinelry Academy begins on the Fronc Reaches world of Rockwellawan.
- January 15th: The engagement of Jessica Marik and Philip Hughes is announced publicly.
- March 7th-15th: Devlin Stone is named the first Exarch of the Republic of the Sphere.
- April 2nd: The Word of Blake leader known as The Master is killed.
- May: Anastasius Focht dies, age 109.
- Calvin McIntyre is killed in the city of Zachariah on Circinus.
- Dalia Bekker is born.