moving the archers, moving the archers

In December during a GvG flurry, we ran into a team that moved the guild archers outside the stronghold into a line blocking the main path from tower to gate.

They then flanked us and went for our guild lord.

We decided to rush forward and try to take their guild lord only to run into the blocking archers that laid waste to us, while we tried (unsuccessfully) to run past them.

Anyone know how to move the archers, like they did? http://www.theamazonbasin.com/gw/forums/index.php?showtopic=4522