2:174 HHQ ADA

**2/174 HHQ ADA (Headquarters and Headquarters Battery, 2nd Battalion, 174th Air Defense Artillery Regiment)** is a unit of the Ohio Army National Guard specializing in air defense. The 174th ADA traces its lineage to Ohio artillery units that have served since the early 20th century, participating in World War II, the Cold War, and homeland defense missions. The 2nd Battalion has played a vital role in supporting both state and federal missions, including airspace security and defense of critical infrastructure. In recent years, 2/174 HHQ ADA has participated in various deployments and training exercises, maintaining readiness to respond to both national defense and domestic emergencies.