What action connected major anderson and general p. g.t. beauregard?

The action that connected Major Anderson and General P.G.T. Beauregard was the Battle of Fort Sumter, in which both were the generals of each side.

Explanation:

The Battle of Fort Sumter was a bombing carried out between April 12 and 13, 1861, by the army of the Confederate States of America (led by Beauregard) with the intention of expelling the federal troops (led by Anderson) that occupied the fortification of Fort Sumter, located at the entrance to the bay of Charleston in South Carolina. The importance of this battle is that it was the trigger that started the Civil War.

b: the exchange of coined money