|Clan Invasion era|
|3055 |||3056 |||3057 |||3058 |||3059||| 3060 |||3061 |||3062 |||3063|
- February: Trial of Absorption begins between Clan Burrock and Clan Star Adder.
- February 14th: Clan Blood Spirit launches attacks against former Clan Burrock enclaves on Priori and Albion.
- July 1st: The Harvest Trials begin.
- Kai Allard-Liao leads the 1st St. Ives Lancers during Operation Bulldog.
- Phelan Kell leads three Clusters against the Sixth Jaguar Dragoons on Labrea as part of Operation Bulldog.
- August 13th: Clan Nova Cat defects to the Star League and leads to its Abjure.
- Smoke Jaguar forces in the Inner Sphere flee to the Homeworlds.
- November 15th: Most Harvest trials ended.
- February 23th: Clan Blood Spirit retreats into isolation on York.
- February 27th: Clan Burrock is completely absorbed by Clan Star Adder.
- Northwind Highlanders contribute forces to Task Force Serpent.
- May 13th: Operation Bird Dog starts.
- May 20th: The resurrected Star League launches Task Force Serpent and Operation Bulldog.
- Clan Ghost Bear moves most of their assets to the Inner Sphere.
- Jacob's Juggernauts contract with the Sarna Supremacy expires.
- Galahad Stables is founded on Solaris VII.
- The DropShip Irregulars mercenary units forms.
- Duke George Hasek becomes the regional command director of the Capellan March.
- Alys Rousset-Marik enters Princefield Academy.
- Capellan Confederation introduce Hypervelocity Autocannon/2.
- Capellan Confederation introduce Hypervelocity Autocannon/5
- Capellan Confederation introduce Hypervelocity Autocannon/10
- Clan Diamond Shark introduced the 'Mech HarJel System.
- BattleMech Vibroblade was developed by Draconis Combine engineers.
- Federated Suns and Lyran Commonwealth introduce Mobile Field Base.
- Clan Goliath Scorpion introduce the UMU.
- Clan Star Adder introduce the Heavy Large Laser.
- Clan Star Adder introduce the Heavy Medium Laser.
- Clan Star Adder introduce the Heavy Small Laser.
- Armor-Piercing ammunition for standard autocannons are put into standard production by the Federated Commonwealth.
- Clan Smoke Jaguar creates the Heavy Machine Gun.
- Clan Goliath Scorpion introduces the Undine battle armor.
- Bergan Industries begins full scale production of Ursus BattleMech.
- Corean Enterprises (MacAdams-Suharno) begins fields testing of the Sirocco BattleMech.
- Malrite Company introduces the new version of the Mosquito Radar Plane.
- Tonbo Superheavy Transport VTOL is secretly deployed during Operation Bulldog for first time.
- Clan Cloud Cobra introduced the Stalking Spider BattleMech.
- Clan Wolf in Exile introduced the Pack Hunter BattleMech.
- The LAAF introduces the COM-7S Commando variant