1. The Battle of Moorefield: On February 27, 1865, Confederate forces under General Rosser attacked Union forces under General Mulligan in Moorefield, West Virginia, which is now part of Virginia. The Union troops were able to hold their ground and forced the Confederates to retreat, which helped pave the way for the Union victory in the Civil War.

2. The Pennsylvania Thirteenth Amendment Ratification: On February 27, 1865, Pennsylvania became the third state to ratify the 13th Amendment to the US Constitution, which abolished slavery in the United States. This vote was significant because it meant that the amendment only needed one more state to ratify it before it could be added to the Constitution.

3. The Grindstone Apple Festival: The Grindstone Apple Festival is held every year on the last weekend in February in Fayette County, Pennsylvania. The festival is dedicated to promoting the area's apple industry and includes apple-related games, contests, crafts, and food.

4. The Reading Railroad Snowstorm Disaster: On February 27, 1956, a severe snowstorm struck the Northeastern United States, causing an 80-car train to derail on Pennsylvania's Reading Railroad. The accident resulted in 34 deaths and over 100 injuries, making it one of the deadliest railroad accidents in US history.

5. The American Helicopter Museum and Education Center: The American Helicopter Museum and Education Center is located in West Chester, Pennsylvania, and is dedicated to preserving and promoting the history of helicopters and other rotary-wing aircraft. The museum has a vast collection of helicopter artifacts, including prototypes, models, and exhibits on the development and use of helicopters in the military and civilian sectors.