WASHINGTON — The House has voted to ban the display of Confederate flags at historic federal cemeteries in the deep South — a low-profile move that prompted an outcry from supporters of the flag.

Those supporters, including some Southern conservatives, were taken by surprise by the vote and the bill’s chief sponsor Wednesday night called for a revote today in which members would go on record on the display of the flag.

The vote to ban the display of the flag at the cemeteries came Tuesday evening after a brief debate on a measure funding the National Park Service, which maintains 14 national cemeteries, most of which contain graves of Civil War soldiers.

The proposal by Rep. Jared Huffman, D-Calif., added language to block the Park Service from allowing private groups to decorate the graves of Southern soldiers with Confederate flags in states that commemorate Confederate Memorial Day. The cemeteries affected are the Andersonville and Vicksburg cemeteries in Georgia and Mississippi.

“The American Civil War was fought, in Abraham Lincoln’s words, to ‘save the last best hope of Earth,”’ Huffman said in a debate in which he was the only speaker. “We can honor that history without celebrating the Confederate flag and all of the dreadful things that it symbolizes.”