Last summer we visited Valley Forge on our “granddaughter trip” to Pennsylvania. They have a great visitor center and one of the tidbits of information that I was reminded of was General George Washington's order that all troops in the Continental army be vaccinated for smallpox. I have also been researching civil war diaries of Union soldiers to gain insight into what my family members experienced in the army during the Civil War. Here too, soldiers were required to get vaccinated.