1. On December 3, 1775, the Continental Congress established the first American navy in Philadelphia, Pennsylvania. This navy played an important role in the Revolutionary War and helped secure America's independence from Great Britain.

2. On December 3, 1829, the first locomotive in Pennsylvania arrived in Philadelphia. This locomotive, known as the Stourbridge Lion, marked the beginning of Pennsylvania's long history as a railroad hub.

3. On December 3, 1830, Pennsylvania became the second state in the United States to abolish the death penalty for certain crimes. This groundbreaking decision was an early example of Pennsylvania's commitment to human rights and social justice.

4. On December 3, 1864, Union General George Custer and his troops defeated Confederate General Jubal Early at the Battle of Waynesboro, Virginia. Many of the Union soldiers in this battle were from Pennsylvania, and their victory helped turn the tide of the Civil War.

5. On December 3, 1992, the first US public library Internet connection was established in Pittsburgh, Pennsylvania. This revolutionary development marked the beginning of a new era of digital communication and made it easier for people all over the world to access knowledge and information.