The 112th Engineer Battalion (112th En Bn) is a distinguished unit in the United States Army National Guard, with origins tracing back to the early 20th century. Initially organized in Ohio, the battalion has served with distinction in major conflicts including World War II, where it participated in campaigns across the European Theater. The 112th has supported both combat and humanitarian missions, specializing in construction, mobility, and survivability operations. In recent decades, the battalion has deployed in support of the Global War on Terrorism and provided critical assistance during domestic emergencies and natural disasters.