Portal:Ohio/On this day.../April 12
- (1861) Confederate troops fired on Fort Sumter in South Carolina, igniting the Civil War. The fort was under the command of Major Robert Anderson, the brother of future Ohio Governor Charles Anderson.
- (1934) The Auto-Lite Strike, which culminated in a five-day melee between Ohio National Guard troops and 6,000 strikers and picketers, began.