Frederick County, Maryland Frederick County, Maryland Frederick County is located in the northern part of the U.S. state of Maryland. As of the 2010 U.S. Census, the population was 240,336. The county seat is Frederick. Frederick County is included in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area. Like other outlying sections of the Washington metropolitan area, Frederick County has experienced a rapid population increase in recent years. It borders the southern border of Pennsylvania and the northeastern border of Virginia. The county is home to Catoctin Mountain Park (encompassing the presidential retreat Camp David) and to the U.S. Army's Fort Detrick. It has also
A History of the Adjutants General of Maryland was an active one as the Maryland National Guard was called into state duty several times (and federalized once) in response to severe domestic disturbances in Maryland. Gelston was instrumental in defusing the Cambridge riot of 1963 and the Baltimore riot of 1968. In World War II, Gelston served as a liaison pilot with an artillery unit in the European theater of operations. He joined the Maryland National Guard in 1947 as the 29th Division's chief artillery air officer. Later, he participated in the Maryland National Guard's air defense program in the Baltimore-Washington area, serving as commanding officer of the