 Complete the following phrase:  These men soon saw action on 27 January, at the Battle of Brienne. Here, two companies of horse artillery, under an officer called Marin, a veteran of the campaigns in Italy and Egypt and personal favourite of the Emperor, were almost completely destroyed, with their guns and commander captured by the enemy. Napoleon was extremely irritated about the failure of the heavy cavalry of the Guard to protect these gunners. A further loss of cannon of the Guard artillery occurred at the 