Changes abound in Somerville's Union Square
Yoon S. Byun/Globe Staff
The unfurling of the Grand Union Flag is reenacted by the city of Somerville annually.
Soldiers in the Civil War also set up camp on Prospect Hill.
Pictured: Former Chief of Police Robert Bradley (dressed as George Washington) departed with the procession from City Hall to Prospect Hill in January 2012 for the 236th anniversary.