As the martial discipline and organization of his retainers and vassals was necessary to the supremacy of the Baron, so the co-operative forces of the Barons were necessary for the maintenance of the throne, and the safety of the kingdom. The former was in continual peril from domestic ambition and discord, and the latter from foreign foes. A Montfort and a Neville, a Percy and a Douglas, were only restrained from subverting the royal power, and grasping the sceptre in their own hands, by the support given by the other Barons to the sovereign,—evinced on many a well-fought field. The invasion of the kingdom by continental armies, was only prevented by the confederate array of the King and his Barons. In the absence of that division of employment which in modern times produced a standing army, the feudal organization with its martial aspect alone supplied the nation with its defence. No sooner did the Frank or Northman display his banner on the wave, for the conquest of Britain, than hill signalled hill, from Devon to the Orkneys, to summon the united Barons to the defence of the realm. With such alacrity was the alarm obeyed, that before a hostile flag could be planted on the headlands of the island, the enemy was driven into the sea, or to the refuge of his ships; leaving full many behind to attest the folly of the expedition. Not less ready were the feudal chiefs to follow the British ensign into foreign wars, there to sustain the glory of its fame. Poietiers and Azincour, Steinkirk and Landen, Ramilies and Blenheim, witnessed the heroic prowess of English chivalry on their hard-fought fields, while the terrible charge of the British infantry passed into the proverbs of those lands. From this system sprang an Essex and a Raleigh, a Chandos and a Churchill, with other great captains of the British hosts, who, by the military organization and discipline which it afforded to the nation, were enabled during the reigns of the Plantagenets, the Tudors, and the Stuarts to preserve our soil inviolate from a foreign foe, and to force entire Europe into respect and homage of the British name.