What are some of the knights military accomplishments?

The knight had an esteemed career winning fifteen battles for England and killing many enemies. Check out this quote:

At mortal batailles hadde he been fiftene,

And foughten for oure feith at Tramyssene

In lystes thries, and ay slayn his foo.

This ilke worthy knyght hadde been also

Somtyme with the lord of Palatye

Agayn another hethen in Turkye.

And everemoore he hadde a sovereyn prys;'