 Complete the following phrase:  By 1812, the imminent eruption of the Russian campaign saw the Grenadiers-à-Cheval recalled from Spain. A part of the 3rd brigade of the Guard cavalry, they numbered 1166 men, spread between five squadrons squadron commanders were: 1st sq. - Perrot, 2nd sq. - Mesmer, 3rd sq. - Rémy, 4th sq. - Hardy, 5th sq. - Morin. The first part of the campaign, from June to September, was nothing more than a long march for the Guard, which was never committed to battle and was able to arrive on the 