The all-but-official policy of segregation on Olympus and Elysium and reserving the highlands for the upper class and nobility had arisen after the Invasion of Strata and fuelled the resentment of the middle and lower classes.
The factor that blinded the upper class to the growing fury of the middle and lower classes was one factor fuelling that rage, the rulers saw the Ganymede settlements as a series of midlands communities supporting the highlands. The truth was that these were not a series of unified communities nor did they consider their purpose to support the upper classes.
The uprising was a chaotic time, and historians frequently fall into the trap of attempting to evaluate those times as one coordinated movement. One movement of provocateurs appear to have started the uprising and were significantly organised. The first target was a group of cadets on medium-term manoeuvres, a simple endurance and orienteering exercise in the midlands and lowlands. Following that, police were the main targets.
This sparked unrest throughout the midlands in the Ganymede area. Acts of civil disobedience and resistance to police and government. Some acts as minor as torching cars or government buildings, others included violence against police and other government people, through to paramilitary actions.
Meanwhile the main group used these minor groups as cover, located and raided several of the hidden Weapon Caches, and used the captured ordinance to successfully ambushed a scout mech lance led by Leftenant Simon Trask.
Subsequent conflicts in the region escalated rapidly, and the military grade weaponry looted from the Weapon Caches trickled down to the peripheral uprisings, not just the main organised group. Towns in the Ganymede area were seized and held by the separatists, and raids were launched upon settlements and farmsteads in the highlands.
During the uprising there were three broad motives. Many were merely rioting and venting their anger. Others were attempting to take and hold their towns as independent communities. And there was the main organised paramilitary group whose motives were unclear at best. It has been suggested that the only goal of the paramilitary group was to challenge and threaten the military forces of Strata to prove it was possible to the populace.
The Separatist Uprising was ultimately put-down by deploying heavier battlemech and armour assets to the area, which paramilitary forces could not contend with. It is known that the majority of separatists merely blended back into civilian life, using their peers as camouflage. Since that time the Ganymede territories have been heavily policed. The usual civil liberties advocates criticise this as being a police state. The official military response is that these ongoing high security measures are necessary. Outbreaks of isolated violence are not uncommon, particularly around the anniversaries of key events during the uprising.
The people of Ganymede naturally resent the constant intrusion into their settlements, and in this the entire purpose of the uprising failed and had the opposite effect. Ganymede is much less free than before the uprising.
Large quantities of military hardware was never recovered, and it is believed that core members of the organised paramilitary group went to ground during the unrest.