Fight or Flight
They'll speak of this for centuries to come. What they say is up to you.
There are two kinds of legends. There are the ones who "defeat" the invading scourge by resting on their laurels, literally, like the ones growing over the clever hiding spot in the bastion, while the other knights do all the dirty work. And then there are the other ones.
The TRUE legends. The ones who meet the enemy at the gate. Who dance to the sound of the approaching hooves. Who laugh in the face of the Dark Lord and swear life and limb to God, honor and clan (in that order).
What kind of legend are you going to be today? Because yesterday you were the type who abandons his battlement as soon as his Pop Tarts are ready.