1. Battle of Gettysburg: On July 3rd, 1863, the Battle of Gettysburg during the American Civil War was coming to a close. Confederate General Robert E. Lee ordered a famous attack on the Union center, an assault known as Pickett's Charge. The attack ultimately failed and marked a turning point in the war.

2. First gas streetlamp: In 1817, Baltimore became the first city in the United States to light its streets with gas lamps. The first batch of streetlamps were ignited on July 3, 1817, lighting up the streets near Baltimore's Holiday Street.

3. Birth of Maryland's first Public School System: On July 3, 1826, the state of Maryland established its first public school system. The system began as a result of a law passed earlier in the year, which provided funding for public schools, and saw the establishment of the first public schools in the state.

4. Maryland becomes the seventh state of the nation: July 3, 1776, marked the day that Maryland became the seventh state to ratify the Declaration of Independence.

5. First American steam engine: On July 3, 1832, The Atlantic began its first steam-powered round-trip from Baltimore to Ellicott's Mills, making it the first American steam engine to complete a round-trip journey. The steam engine served as a historic moment for transportation, revolutionizing the way goods and people were transported in the United States.