…& so started the discontent at the Imperial court.The marriage
cemented an alliance between the Imperial Throne and Vilani industry and added greatly to the stability of the lmperium when stability was an elusive quantity. The alliance, however, alienated believers in the Solomani Cause, which from this point forward took on an increasingly anti-Imperial tone.
The Civil War seems to have broken the Solomani aristocracy's near monopoly.
Though from Mike’s quote it seems it was after the Civil War that the Solomano fell out of favour.
So canon say that the Solomano Party became the primary political power in the Confederation on signing the Charter of Confederation in 871. Is there a reference to a link between the disaffected Sylean Solomani in 679 and the establishment of the Confederation with the Charter in 871?