1. In 1862, the Union Army under General George B. McClellan began its reconnaissance of York County during the American Civil War. The reconnaissance lasted until March 11 and was an important part of McClellan's preparations for his Peninsula Campaign.

2. On March 7, 1924, the famous racehorse Man o' War won the Lexington Handicap at Hialeah Park in Florida. Man o' War is widely considered one of the greatest racehorses of all time and won 20 of his 21 career races.

3. In 1965, the Pennsylvania State Game Commission announced that the state's wild turkey population had reached a record high of 130,000 birds. Pennsylvania is now known for having one of the largest and healthiest wild turkey populations in the country.

4. In 1983, the Pennsylvania State Senate passed a bill creating the Pennsylvania Lottery. The lottery has since become one of the state's biggest sources of revenue, raising billions of dollars for programs like property tax relief and senior citizen services.

5. On March 7, 1996, the Pittsburgh Penguins retired Mario Lemieux's jersey number 66. Lemieux is considered one of the greatest hockey players of all time and won two Stanley Cup championships with the Penguins as both a player and owner.