- Federated Suns Operation WINTER GARDEN continues:
- Armed Forces of the Federated Suns take control of Acala.
- Federated Suns succeed in recapturing Alcyone from Liao forces.
- Federated Suns successfully retake Daniels from Liao troops.
- Federated Suns take control of Perkasie.
- Federated Suns successfully capture Oli, the world will ultimately be abandoned.
- Federated Suns successfully capture Khi, the world will ultimately be abandoned.
- Federated Suns successfully capture Knutdor, the world will ultimately be abandoned.
- 5 July: Federated Suns launches daring St. Ives Raid, almost capturing Chancellor Dainmar Liao.
- Chancellor Dainmar Liao dispatches emissary to New Avalon requesting terms to end conflict between Houses Davion and Liao.
- McKinnon's Company launch costly deep raid against Capellan capital of Sian.
- Free Worlds League Military operations slow following death of Captain-General Gerald Marik.
- 12th Star Guards breaks contract with Draconis Combine, returning to Lyran Commonwealth employ.
- Doctrinal Edict of 2861 issued by Primus of ComStar Raymond Karpov, formalizing the process of naming the Primus and making ComStar's three-tiered ranking structure of Acolytes, Adepts and Precentors official.
- Isengrim mercenary unit is formed.
- Veddar Affair - ComStar Adept Rosemary Veddar is discovered to be a Lyran Intelligence Corps agent by ROM, triggering massive witch hunt to unmask further outside agents.
- Philippa Marik named Captain-General of Free Worlds League
- Clan Mongoose develops the so-called Chippewa IIC