1. On June 30, 1864, the Battle of Ream's Station took place in Dinwiddie County, Virginia, during the American Civil War. New Jersey troops participated in this battle, which saw Union forces successfully defend their position against a Confederate attack.

2. In 1900, the Collingwood Park Amusement Park opened in Collingwood, New Jersey. The park featured a roller coaster, Ferris wheel, and other attractions, and was a popular destination for families for several decades until it closed in 1924.

3. On June 30, 1936, the George Washington Bridge officially opened to traffic. The bridge, which spans the Hudson River between New York City and New Jersey, was completed after several years of construction and is now one of the busiest bridges in the world.

4. The original Atlantic City Boardwalk was destroyed by a storm in 1944, but it was rebuilt and reopened on June 30, 1945. The Boardwalk is a major attraction in Atlantic City and has been featured in numerous movies and television shows.

5. On June 30, 1971, New Jersey became the second state in the country to allow residents to vote at age 18. The change was made after the passage of the 26th Amendment to the U.S. Constitution, which lowered the voting age nationwide.