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Did you fall out with the HC or something?
In any case, the date in Starlancer is fairly clearly specified, as is the history of spacial development leading up to it - Starlancer's war isn't actually the first fought between the two powers. More like the third or forth. There's a fair amount of lore hidden in the iTAC. The Alliance and Coalition pretty much always existed during the practical space ages of Sol, as well.