Minor spoiler warning.
Entries here are from TRO3150 and XTRO RotS 3. Since both are a couple of years old, i wouldn't really call these spoilers, if not for the fact IlClan will almost certainly detail these events and so these can be regarded as spoilers for IlClan.
I went over TRO3150 and XTRO RotS 3 entries few months ago and wrote down everything interesting and arranged them in rough chronological order. For whatever reason, i haven't posted them despite that being the plan but fortunately i noticed the txt file with these. There may be mistakes, so don't take this as real, correct timeline.
Late 3145
-"In December of 3145, Julian Davion’s Task Force Navarre hit Menkalinan."
3146
-Republic-FedSuns pact renewed.
-Battle of Marlette.
-Ghost Bear raid on Arkab?
-Duchy of Andurien assaults Oriente Protectorate.
-January: Wolf Empire raid on Alkes
-January: Raid on New Canton by FedSuns
-February: Assassination attemps against Wolf Empire officials on conquered Solaris VII begin, last over year.
-February: Jade Falcons raid Ludwigshafen.
-April: Pirate raid on Filtvelt Coalition.
-May: Clan Sea Fox attacks Pleione.
-May: Three-way figting between Capellans, Dracs and FedSuns on Deneb Kaitos.
-September: Jade Falcons assault Ark-Royal. Fall of Ark-Royal.
3147
-FedSuns counterattacks New Syrtis, 3 month battle. Capellan terrorism devastates the planet over the year and the next.
-LCAF strikes preemptively on Valloire.
-FedSuns Operation CERBERUS.
-First Davion Guards raid/counterattack Franklin.
-Late: Kisho Nova Cat's Wendigo appears on a village on Almunge.
-April: Marian Commowealth attacks Marik worlds, including Kendall.
-May: Ghost Bear raid on Yamarovka.
-June: Julian Davion meets with FedSuns nobility.
3147-3148
-Buena Collective formed? Fighting between Buena Collective and Lyran Commonwealth.
-Campaign to recapture New Syrtis.
-Sactions on Regulus by Clan Sea Fox, Regulus dependent on Sea Fox trade?
-FedSuns raid Draconis Combine worlds.
-Captain-General Jessica Marik assassinated
3148
-Julian Davion fights on New Syrtis against Capellan invaders.
-RotS Remnant raid on Kalidasa, encouter Ryoken III-XP.
-Resistance against Jade Falcon occupiers across Donegal Province.
-Early: Jade Falcons attack Coventry, the Battle of Coventry.
-Late: Sixteenth Hastati Sentinel raid Ruchbah beyond the Wall.
-March: First Andurien Rangers fight with First Marik Protectors on unclaimed world between Duchy of Andurien and Regulus.
-July: Oriente wins Oriente-Regulus war. Regulans prepared a nuclear attack before their surrender, some forces gone AWOL with nukes.
-August 14: Joyeux Corsaire pirates raid Protectorate
-August: Deep strike on Remagen by Draconis Combine
3149
-Fighting on Addicks between the Twelfth Hastati and Fourth Dieron Regulars.
-Early: CapCon captures Hall.
-June: attack on Protectorate Arms factory on Diik by the Lying Tongue Company of the Abominari pirate band.
-June: Wolf Empire invades Dubne, RotS Remnant defends but loses and retreats from the world.
3150
-Early: Fortress Walls come down.
Unknown:
-Joint Capellan-Draconis Combine invasion on Ingress against the Republic.
-Nineteenth Battle of Hesperus II.
-Hell's Horses Operation NOYAN, assault on New Oslo.
-Jade Falcons and Hell's Horses clash on Leskovik. Alliance unraveling, tensions mounting.
-Davion counterattack on Palmyra.
-Davion operation PERCEVAL.
Notes:
-Field Manual 3145 and Era Report 3145 stop before December in '45, before the first point happens.
-I'm not sure if 19th Battle of Hesperus II is the one where Malvina Hazen was injured or if it is a newer battle that happens sometime between 3145-3150.
-I would guess Operation PERCEVAL is the counterattack on Palmyra but both are referred rather vaguely in the TRO so not sure.
-There is little talk about 3150. Presumably the biggest events will happen then. We know there will be an IlClan. We know Alaric Ward will duel with Devlin Stone. (I think there was a preview of IlClan cover somewhere, which portrays the duel, and the way i hear it, the duel happened in an event few years back.)
-Whether the timeline extends beyond 3150 in IlClan is unknown. Ben H. Rome's comments in news threads indicated the original plan was for things to end in 3150, but how much of the original plan remains is unknown. That said, 3150 is a nice round number, and timeline jumping forward exactly 100 years is another nice round number.
-The Fortress Republic's Walls are referred in plural. Whether this is figurative or literal is unknown. I would assume literal, it is more likely the Fortress is created by multiple devices rather than just one, if you ask me.