- early 3021: Battle of Harlow Wood on New Wessex.
- September: Wolf's Dragoons attack the Kurita world of Dromini VI with the Alpha, Beta, and Epsilon Regiments, where they encounter the elite Second Sword of Light regiment among the defenders. It dissolves into a debacle for the Kurita forces.
- The Black Widow Company raids Doneval II.
- Wilson's Hussars unsuccessfully raid the Draconis Combine world of Kimball VI.
- The Sixth Marik Militia successfully raid the Capellan world of Nanking.
- Janos Marik and ComStar finalize agreements to release Thomas Marik from the ComStar Order to become heir to the Captain-Generalacy of the Free Worlds League.
- Following the events on Dromini VI, Minobu Tetsuhara is removed from command and dispossessed.
- Shin Yodama is born on the Planet Marfik.
- Garman Doucette is born on Armington.
- Director of ComStar Explorer Corps Athena Heath dies in office.
- Sumire Hiyama succeeds Heath as third Director of the Explorer Corps.
- The RFL-4D variant of the Rifleman BattleMech is introduced.