How does Henry motivates his men in Act 3 Scene 1?

The scene opens in the middle of a battle to capture Harfleur. Henry says, "Once more unto the breach, dear friends, once more, / Or close the wall up with our English dead" (3.1.1-2). Henry proceeds to order his men to not dishonor their glorious forefathers. He motivates his men by telling them to teach the French how to really fight, thereby rallying his men to war and victory.