1. On August 3, 1795, the Treaty of Greenville was signed between representatives of the United States and various Native American tribes, including the Shawnee, Miami, and Delaware. The treaty established a boundary line between Native American lands and areas open to settlement by the United States.

2. On August 3, 1852, the first game of baseball in Newark was played at Newark's Bank Street Grounds. The Newark Eagles played against the New York Gothams, with the Eagles winning 14-13.

3. On August 3, 1923, the first issue of the New Yorker magazine was published. Though not specific to New Jersey history, the magazine has had several notable contributors from New Jersey throughout its history, including Dorothy Parker and Philip Roth.

4. On August 3, 1981, infamous New Jersey mob boss Anthony "Tony Pro" Provenzano was sentenced to 25 years in prison for racketeering and murder conspiracy. Provenzano was a key figure in the disappearance of labor leader Jimmy Hoffa.

5. On August 3, 2014, a major water main break occurred in Hoboken, New Jersey. The break caused widespread flooding and damage to homes, businesses, and public property. Approximately 2000 residents were affected by the water main break, and repairs took several days to complete.