Arlington County was carved from a section of the District of Columbia and formally named by the Virginia General Assembly in 1920. The rural farming community across the Potomac River was home to vacationing District of Columbia elite as well as rumrunners and brothels. Law enforcement fell to the commonwealth attorneys, sheriffs, special officers, and citizen leagues. The county board adopted a proposal, and the Arlington County Police Department...

Rare photos: Lincoln's inauguration, Ford's Theater in 1865, Frederick Douglass, Women's Suffrage Parade, Georgetown in 1893, White House East Room in 1893 and more. Views by Brady, Bishop, Peale, others. Pre-Civil War to modern era.