On 10 Aug 1557 Henry Manners 2nd Earl of Rutland (age 30) fought being Captain-General of the cavalry at St Quentin during the Battle of St Quentin.

Henry Machyn's Diary. 14 Aug 1557. The xiiij day of August cam tydynges from beyond the see that the Kyng (age 30) our master had taken mony nobull men of France gohyng to vetell Sant Qwynten, the constabull of Fransse and a vj m. presonares taken, and vj .. cartes and wagens laden with tresur and vetell, at a plasse callyd Sant Qwynten, and ther my lord Hare Dudley (deceased) was slayn at the wynnyng of ytt.

Henry Machyn's Diary. 03 Sep 1557. The sam day at nyght cam commondement that evere chyrche in London, and oder contrey and shyre, to syng and make bonfeyrs for the wynnynge of Sant Qwynten; and ther was slayn my lord Hare Dudley (deceased) the yonger sone of the duke of Northumberland that was he[aded,] with mony mo, at the wynnyng of yt.

Note. P. 150. Death of lord Harry Dudley. Fourth son of John duke of Northumberland. He was condemned at the time of the ruin of his family, (see p. 48,) but pardoned by the queen. He married Margaret only daughter of lord chancellor Audley; and, leaving no issue, his widow became the second wife of Thomas fourth duke of Norfolk, and from this match descend the earls of Suffolk and Carlisle. The duke's former lady had expired just before the death of lord Henry Dudley, and their surviving partners intermarried before the end of the year. The duchess Margaret died at Norwich Jan. 9, 1563-4. (See lord Braybrooke's History of Audley End, 1836, 4to. pp. 27, 296.)

Henry Machyn's Diary. 19 Sep 1557. The xix day of September cam a commondement downe to all parryche(s) in London that they shuld go in prossessyon at Powlles, and Te Deum laudamus songe; all the chyrches in London to synge, and rynge for wynnynge of Perro [Note. Assumed to be a reference to John Perrot (age 28) who fought at the Battle of St Quentin] in Franse and odur plasses.

Henry Machyn's Diary. 18 Nov 1557. [The xviij day of November died the lord Bray, within the Black-friars, near Ludgate]; the wyche he gatt ys deth [at St. Quintin's.]