Given braninst
when did Anderson return to raise the u. s. flag once again over fort sumter

April 14, 1865

Explanation:

"A band led dozens of visitors into Fort Sumter in Charleston harbor where an actor portraying Major General Robert Anderson spoke the same words uttered by Anderson on April 14, 1865, when he raised the Union flag again at the fort he had surrendered at the start of the fighting four years earlier."