12th » American Civil War: The war begins with Confederate States of America e.g Confederate forces firing on Fort Sumter, in the harbor of Charleston, South Carolina.
13th » American Civil War: Fort Sumter surrenders to Confederate forces.
19th » American Civil War: Baltimore riot of 1861: A pro-Secession in the United States Confederate States of America e.g Secession mob in Baltimore, Maryland, attacks United States Army troops marching through the city.
20th » American Civil War: Robert E. Lee resigns his commission in the United States Army in order to command the forces of the state of Virginia.
27th » President of the United States called American President Abraham Lincoln suspends the writ of 'habeas corpus'.