On June 6th, 2017, a massive offensive was launched by Sabbat forces against the residents of the city of Chicago. To conceal their efforts to the mortal world, they were disguised as biker and street gangs engaging in criminal turf wars. The June Invasion lasted days and many prominent kindred are believed to have met their end.
The offensive allegedly resulted in the deaths of Archbishop Solomon Birch, Edgar Drummond (Known as The Railroad Regent), Cedric Calhoun, Joseph Peterson, Brennan Thornhill, Gordon Keaton, Hank Cave, Neil "Karl" Graham, Sir Ben Smith, and Norris Kleinspiegel. In response to the attack, the Lancea Sanctum and the Carthian Movement formed a defense alliance spearheaded by Cedric Calhoun whom was killed two nights later at the negotiation table with the Sabbat. The invasion was also a major blow to the Masquerade as law enforcement and local gangs became suspicious of the increased violent activity in the city. On the third day of violence, the Sabbat forces had made a push into the Loop, but were eventually beaten back, but at great cost. The Sabbat of O'Hare were said to have compromised the domain of House O'Leary, whom have since gone into hiding and have been out of communication with the rest of the city. In the aftermath of the attack and the death of prince Maxwell Clarke, many claims to praxis have been made. Most notably are Horatio Ballard, Modious, Cort Granger, and Lord Tyrus Burland, with former seneschal Garret McClain claiming pro tempore rule while Maxwell's adherents await hes speculated return. Other citizens of Chicago have taken their own measures to ensure security and defense from future incursions. One such citizen is Bobby Quinn whom formed an alliance with local Werewolf packs after they too became targets of the Sabbat. Once of the largest battles fought was at Midway Airport, domain of Julie Walsh, where the Masquerade suffered a massive breach. Multiple photographs with evidence of the supernatural nature of the battle and open acts of feeding were posted to social media. Video of kindred turning to ash during the battle were shown on a local news station and Mortal society became briefly aware until all news reports and posts were squelched by the CIA. The Jefferson Park Collective, posing anonymously as a super hacker named Twilight, released a dossier covering underground medical research and top secret urban weapons testing in Chicago that managed to deflect scrutiny just enough to preserve the Masquerade.
Investigations during the aftermath of the June Invasion show the Sabbat attacked centers of Kindred society, such as the Discarded Image, The Succubus Club, The Clark Street Rack, and Midway Airport as well as numerous domains. The coordinated and targeted nature of these attacks has been held as proof that the Sabbat has vast knowledge of the workings of society in Chicago. Multiple independent investigators have speculated that many supposed Anarch and unaligned kindred coming into the city in recent months have actually been Sabbat spies and sleeper agents collecting information and awaiting the signal to strike.