Hostile actions on the part of the confederacy and the Commonwealth of Virginia predated both of those dates. The first hostile action occured on December 27, 1860 when the South Carolina militia seized federal property in Charleston. It continued through the following months: seizing arsenals, forts, mints, post offices, government property of all types. It included firing on the Star of the West. It only culminated in the firing on Sumter.
In Virginia militia forces were on the way to seize the arsenal at Harper's Ferry even before the vote on secession, and weeks before the exchange of gunfire on March 9th.
You are forgetting about the US soldiers that on December 26, 1860 fought the captain of the schooner transporting women and supplies to Fort Johnson, overcame him, and took his ship to Fort Sumter. Pirates.