The squatters were roused initially by an October 1849 lawsuit filed against a logger named Z. M. Chapman, who had constructed a log cabin nearby Sutter's Fort on Priest, Lee, & Company-owned land. When the commercial institution could not pool sufficient evidence displaying their ownership of the land, Chapman extended his claim, challenging at first Sutter's grants and later on all city-owned land. Charles L. Robinson approved of Chapman's actions and built his own shack on another's private land. The squatting settlers organized the Sacramento City Settlers Organization; Robinson became the group's president. The settlers who supported government recognition of
squatters' rights began to host public meetings in the spring of 1850, at which they swore to defend their lands if confronted. A "Law and Order Association" was formed and an irregular
militia was organized to challenge the speculators who charged high prices for the land they had purchased from Sutter, as well as Sutter himself. Tension in the city began to increase after a group of speculators had a squatter-built and squatter-owned fence demolished. In May 1850, the newly elected judge of
Sacramento County, named
E. J. Willis, charged a squatter named John T. Madden with unlawful occupation. When the court ruled against Madden on August 8, However, the next day on August 13, a
writ of restitution was issued of the locale at which John T. Madden had stayed as a squatter prior to his trial; the writ of restitution called forth James McClatchy and another Free Soil advocate named Richard Moran. Along with others who had opposed the sheriff's decision to execute the writ, McClatchy and Moran were jailed aboard a ship that served as the city's prison brig, the
La Grange. On August 14, Maloney and Robinson mobilized their military force of approximately forty or fifty and marched through downtown Sacramento, intent on freeing the Madden residence from government confiscation; however, Hardin Bigelow believed that they were marching towards the
La Grange to free McClatchy and Moran, and mobilized a military force. Fearing a full-scale uprising, Bigelow marched with his fellow settlers and confronted Maloney and Robinson at the corner of streets Fourth and J. ==Battles==