Confederate incursions from Falls Church, Minor's Hill and Upton's Hill —then securely in Confederate hands—occurred as far east as the present-day area of Ballston . On August 17, 1861 an armed force of 600 Confederate soldiers engaged the 23rd New York Infantry near that crossroads, killing one. Another large incursion on August 27 involved between 600 and 800 Confederate soldiers, which clashed with Union soldiers at Ball's Crossroads, Hall's Hill and along the modern-day border between the City of Falls Church and Arlington. A number of soldiers on both sides were killed. However, the territory in present-day Arlington was never successfully captured by Confederate forces. 
Clarendon is also host to several local and County-wide events each year, including Arlington's Neighborhood Day parade (held the second Saturday in May), the Mardi Gras parade and Tax Blues Night  . The largest annual event, "Clarendon Day,"  is held on a Saturday in mid-October and features four live music stages, local restaurant and coffee house booths, clothing, jewelry, antiques and collectibles sales, children's games and rides, an ice-cream eating contest and other local traditions.  Additionally, each spring Clarendon is host to the Clarendon Cup, part of the Armed Forces Cycling Classic , one of the largest one-day professional and amateur bicycle races in the . 
Virginia Cooperative Extension programs and employment are open to all, regardless of age, color, disability, gender, gender identity, gender expression, national origin, political affiliation, race, religion, sexual orientation, genetic information, veteran status, or any other basis protected by law. An equal opportunity/affirmative action employer. Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the . Department of Agriculture cooperating. Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; M. Ray McKinnie, Administrator, 1890 Extension Program, Virginia State University, Petersburg.