I love a lot of these great suggestions! I especially like TRO: Militias, and a Covert/Black Ops sourcebook. The last of these I find really intriguing in regards to the Clans. Have we been told the whole story about the Watch/Intelser/Chatterweb? :-X :-X :-X
Here are a couple I did not see suggested or would like to elaborate more:
Historical for Clan Brush Wars (Absorptions, Annihilations, Tokasha, etc.)
Historical for each Secession War
TROs!!! Everyone loves TROs (with example content):
TRO Golden Century, TRO Political Century (Coyotl, Wakazashi, Summoner, Minsk, Fox, Vision Quest)
TRO 1st,2nd,3rd Secession War (Hermes II, Vindicator, Merlin)
TRO Age of War (Banshee, Archer, Sarissa)
TRO Star League (Lancelot, Mercury, Shooting Star)