Lyric discussion by Wolfensteinrevised 

Cover art for We Want War lyrics by These New Puritans

Secret recordings were made in the marsh I bore a hole in the tree just to see Knights dance in molecules, here's Gallahad They're rising back up, they're rising back up.

I think that this verse is about the English legend that one day King Arthur and his knights will rise again when England is in grave danger (War).