Short answers, pulled from the story.
Admiral Nelson commanded the British fleet with 27 ships of the line carrying approximately 17,000 men under his command. His flagship was HMS Victory which was one of three 100-gun first-rates in his fleet.
The battle took place on the 21st of October 1805 when Nelson sent the flag signal England expects that every man will do his duty displayed on the mizzen mast requiring twelve lifts. Fighting began around noon and continued until late afternoon when French Captain Lucas surrendered Redoutable at 13:55.
Vice-Admiral Villeneuve fielded 33 ships of the line including some of the largest warships in the world at that time. The Spanish contributed four first-rates while the French provided eighteen ships of the line along with five 40-gun frigates and two 18-gun brigs all French.
Nelson died half-past four three hours after being hit by a musket bullet fired from the mizzentop of Redoutable which passed through his spine sixth seventh thoracic vertebrae lodging two inches below right scapula muscles back. He expired at approximately 4:30 PM on the 21st of October 1805 after ordering the fleet anchor as a storm predicted.
After parole in 1806 Villeneuve returned France where he was found dead in an inn room stop way Paris six stab wounds chest dining knife officially recorded committed suicide. His flagship had been taken back Britain before this event occurred.