Flights but not really what we're looking for.

A.D. 851. .. Alderman Ceorl, with the men of Devonshire, fought the heathen army at Wemburg, and after making great slaughter obtained the victory. ... came three hundred and fifty ships into the mouth of the Thames; the crew ... stormed Canterbury and London; putting to flight Bertulf, king of the Mercians, with his army; and then marched southward over the Thames into Surrey. Here Ethelwulf and his son Ethelbald, at the head of the West-Saxon army, fought with them at Ockley, and made the greatest slaughter of the heathen army that we have ever heard reported to this present day. There also they obtained the victory.

A.D. 993. This year came Anlaf with three and ninety ships ... and so to Maidon, where Alderman Britnoth came against him with his force, and fought with him; and there they slew the alderman, and gained the field of battle; ... Afterwards came the army to the mouth of the Humber; and there did much evil both in Lindsey and in Northumbria. Then was collected a great force; but when the armies were to engage, then the generals first commenced a flight; namely, Frene and Godwin and Frithgist.

350-390 ships. Now that's a nice number, maybe 10 000 warrior? Or much more?