All Those Thin Lines

Operation Luna.

The speaking sword, recounting the battle of Tenchebrai:

"'There we stood, a thin red line - No, I'm mixing my epochs, damme.'" (22, p. 205)

- and the battle of Hafrsfjord:

"'There we stood, a thin mail-clad line -'" (p. 206)

- and the battle of Stamford Bridge:

"'There we stood, a thin Anglo-Danish line -'" (ibid.)

- and the battle of Brunanburh:

"'...there we were at Brunanburh, a thin hairy line -'" (28, p. 257)

OK. This has become another one of those so, if I find any more, then I will add them here.