Brittany, Action off (Gallic War).
This, the first sea fight in the Atlantic, was fought B.C. 56, between the Roman fleet under Brutus, and the fleet of the Veneti, consisting of 220 galleys. The Romans were victorious, and the surrender of the Veneti and the whole of Brittany quickly followed.
Bronkhorst Spruit (First Boer War).
The opening engagement of the war, when, on December 20, 1880, a British column, 259 strong, under Colonel Anstruther, was ambushed by 150 mounted Boers under Joubert, and defeated with a loss of 155 killed and wounded. The Boers stated their losses at 2 killed and 5 wounded only.
Brooklyn (American War of Independence).
Fought August 27, 1776, between 30,000 British under Sir William Howe, and the Americans, about 11,000 strong, under General Putnam. The Americans were completely defeated, with a loss of about 2,000 killed and wounded. The British lost 65 killed and 255 wounded.
Brunanburh (Danish Invasion).
Fought 937, when Æthelstan defeated with great slaughter the combined armies of Anlaf the Dane, Owen of Cumberland, and Constantine III of Scotland.
Bucharest (Ottoman Wars).
Fought 1771, between the Turks under Mousson Oglou, and the Russians under General Romanzoff. The Turks were totally defeated.