Speaking of acts of war, let's look up the definition of acts of war. From USLegal.com, my emphasis below:
An act of war is an action by one country against another with an intention to provoke a war or an action that occurs during a declared war or armed conflict between military forces of any origin. The loss or damage caused due to such conflicts are excluded from insurance coverage except for life assurances.
As I posted above, Lincoln's two wartime secretaries admitted that Lincoln intended to provoke war by sending his armed expedition to Fort Sumter without the blame for starting the war falling on him. You seem to have fallen for Lincol's ruse. Lincoln's actions meet the definition above of an act of war.
I've posted above Major Anderson's statement that Lincoln's Sumter expedition meant war. He knew what it meant, even if you, 155 years later, do not.
Here is an old post of mine that summarizes some of Lincoln's actions at that point in time and the reactions of other key players to his orders. Those key players weren't dummies. They knew and said that Lincoln's orders meant war. See Post 54
Have you ever been to the New Market battlefield?