|The Fyrd were not full time fighters. They were called up when the King needed them. They were not peasants but trained men, chosen because they could be useful in war.||
from the Bayeux Tapestry
The moustache shows they were Saxon!
In 1066, as King Harold marched north to Stamford Bridge, men in the towns he passed would have joined the Fyrd. As King Harold marched south, these men would have gone home, and others joined as Harold got further south.