The Charge of the Light Brigade was an extraordinarily ill-advised British offensive during the Battle of Balaclava in the Crimean War. On 25 October 1854, Lord Cardigan was ordered to advance on the Russians to prevent them from 'carrying away the guns'. However, the Light Brigade attacked the wrong position and lost over 270 of its 670 men, with more taken prisoner. This action was immortalised by Alfred, Lord Tennyson in his poem The Charge of the Light Brigade.
Read the poem, or listen to Tennyson himself reciting it, here.