The only tricky question is number 3.
One could make the argument that the Civil War began when the Star of the West was fired upon by Fort Sumpter, which occurred January 9th, of 1861.
The Confederacy itself was formed February 4th of 1861.
Lincoln wasn’t inaugurated until March of that year, after 7 states had already seceded.
Actually it is Fort Sumter, not Sumpter and the Star of The West was not fired upon BY Fort Sumter, the union forces were at Fort Sumter and the Star was sent to resupply and reinforce the garrison at Fort Sumter. The firing was done from Morris Island by Citadel cadets.