Celestial Dragon Hit-and-Run Incident

The Celestial Dragon Hit-and-Run Incident is an event that occurred when Monkey D. Luffy attacked Saint Charlos, causing the World Noble to call Admiral Kizaru in retaliation. The event comprises the entire fallout, and marks the first use of the Pacifista prototypes.

Origin
While on the Sabaody Archipelago, Camie, ally of the Straw Hat Pirates, was kidnapped by the Hound Pets. In attempt to save her, the Straw Hats participated in her sale at the Human Auctioning House; however, as the sale progressed, Luffy crashed into the auction house and attempted to run to Camie. He was stopped by Hatchan, but upon seeing the fish-man, Saint Charlos shot him and began dancing over how he could enslave Hatchan for free. Enraged, Luffy punched Charlos, knocking him unconscious and triggering the incident.

Event
As the protocol for a Celestial Dragon being attacked states, a Marine Admiral was called to the location; specifically, Admiral Kizaru arrived shortly, accompanied by a warship and the newly-completed Pacifista prototypes. He began hunting the members of the Eleven Supernova present on the archipelago, who were trying to evacuate.

Across the archipelago, the Supernova battled squads of Marines. The Straw Hat Pirates battled a Pacifista, but as they celebrated their victory, they were attacked by a second one, this time accompanied by Sentomaru. The pirates prepared to flee, but Kizaru arrived to stop them, soon followed by Bartholomew Kuma. When Silvers Rayleigh assisted the pirates and delayed Kizaru, Kuma sent the Straw Hats across the globe, separating them and ending the incident.

Aftermath
Unlike the Straw Hat Pirates, the rest of the Supernova were able to escape the archipelago. Kuma's forceful separation of the Straw Hats was actually an act of mercy, allowing Luffy to participate in the Summit War of Marineford and the crew to train independently.

After the successful use of the Pacifista, and their impressive show of strength, they were used in the Summit War and continued to be developed by Vegapunk.