Well the whole trigger for the Civil War plays on an unanswered question from the ComStar Sourcebook which had Toyama left alone with Blake and did he in fact kill him?
Of course there are various internal tensions as well as the Sinclair-Collins rivalry that I always had going. In 2815 the Republic officially signed a Truce with the Free Worlds League (Treaty of Connaught) and about the same time tensions with the Draconis Combine also lessened thanks to the Federated Suns offensive mainly. No formal agreement is ever reached with House Kurita but Terran armed involvement in the 1st Succession War ends in large part. With most of its territory recovered the Republic begins to rebuild and as the neutral arbiter attempts to negotiate an end to the 1st Succession War altogether. Despite being plagued by health problems Regent Amanda Cameron presses forward with peace initiatives to end the fighting throughout the InnerSphere and reestablish contact with the Periphery.
So in 2819 (May to July) Jerome Blake dies. Conrad Toyama assumes control of ComStar and begins to reorder the organization as a pseudo religion. Toyama's mysterious behavior and ComStar radical regrouping starts a CIB investigation into the death of Blake.
- Duchess Janice Hawkins of Rigel Kentarus commits suicide under suspicious circumstances. A close friend of Ian Sinclair, her suicide note implicates him in an illict relationship. Thanks to ComStar word spreads quickly throughout the Republic.
- Despite doctors warning Amanda with her family travels to Rigel Kent to attend Hawkins funeral. She dies in transit back to Earth.
- Accusing Sinclair of murder, Arnold Collins attempts to remove him from power starting the Terran Civil War.
- The Battle of Earth begins as "Loyalist" forces under the command of Arnold Collins attempt to seize the capital.
2820 (Early) Republican forces under the command of Ian Sinclair manage to drive Loyalist forces off Terra despite sabotage attempts by ComStar in support of Collins.
- ComStar at the direction of Toyama uses old and nearly forgotten fall back plans of the Republic to escape to the Rim Protectorate.
- Rogue ComStar personnel (who were either isolated or escaped Toyama's purge) led by Herman Schwepps establish Astral Networks (or AsNet) as an interstellar communications competitor.
- Most of Collins support comes from the Spinward side of the Terran Republic (Rhodesian Province, half Nanking Province, half Dieron Province and even a little bit of the Terran Province) although there are battles throughout the nation at first.
- AsNet secures contracts with the TR, FS, and LC while ComStar gets rights to DC, FWL, and CC.
- CIB releases its findings which all but charge Toyama in the deaths of Blake and Hawkins, which ultimately led to the death of the Last Cameron, via AsNet. Support falls away from Collins as word spreads.
- The crucial Battle of Fletcher begins. As the main industrial complex of the Loyalists it is a major objective for Sinclair's Republicans.
2821 - Rim Protectorate Commander Thomas Bryne is assassinated as the Loyalists easily seize control of this distant Terran possession often disstatisfied with their overlords.
- The battle of Fletcher is won by Republican forces all but dooming Loyalist resistance.
- Rim forces surge across the Lyran border to liberate several key planets like Apollo from Spheriod control. Helped covertly by ComStar it is extremely popular.
- Primus Toyama oversees the recovery of Camelot Command within the Dark Nebula which he plans to use as ComStar's new headquarters. Renaming the hidden planetiod Blakemore it is quickly restored and upgraded by ComStar techs with material taken from Terra.
- Climatic battle of New Rhodes. Sinclair kills Collins in a single Mech duel. His son and several supporters manage to escape from the Republic with the help of the Draconis Combine.
(December) Exhausted from nearly 40 years conflict the 1st Succession War ends. ComStar and AsNet both agree to abide by the Communications Protocols as laid down by Blake rather than gut the rebuilt HPG network.