CHADDS FORD— On Sunday, March 8, Brandywine Battlefield Park will celebrate Pennsylvania’s 345th birthday with free admission and engaging programming for all ages. From 12 p.m. to 4 p.m., visitors are invited to explore the historic grounds, enjoy guided tours, and take part in activities that honor the Commonwealth’s founding and Revolutionary War legacy. Pennsylvania was established on March 4, 1681, when King Charles II granted William Penn …