But those very institutions which made a tribe of highlanders, all bearing the same name, and all subject to the same ruler, so formidable in battle, disqualified the nation for war on a large scale. Nothing was easier than to turn clans into efficient regiments; but nothing was more difficult than to combine these regiments in such a manner as to form an efficient army. From the shepherds and herdsmen who fought in the ranks up to the chiefs, all was harmony and order. Every man looked up to his immediate superior, and all looked up to the common head. But with the chief this chain of subordination ended. He knew only how to govern, and had never learned to obey. Even to royal proclamations, even to Acts of Parliament, he was accustomed to yield obedience only when they were in perfect accordance with his own inclinations. It was not to be expected that he would pay to any delegated authority a respect which he was in the habit of refusing to the supreme authority. He thought himself entitled to judge of the propriety of every order which he received. Of his brother chiefs, some were his enemies and some his rivals. It was hardly possible to keep him from affronting them, or to convince him that they were not affronting him. All his followers sympathized with all his animosities, considered his honour as their own, and were ready at his whistle to array themselves round him in arms against the commander in chief. There was therefore very little chance that by any contrivance any five clans could be induced to cooperate heartily with one another during a long campaign. The best chance, however, was when they were led by a Saxon. It is remarkable that none of the great actions performed by the Highlanders during our civil wars was performed under the command of a Highlander. Some writers have mentioned it as a proof of the extraordinary genius of Montrose and Dundee that those captains, though not themselves of Gaelic race or speech, should have been able to form and direct confederacies of Gaelic tribes. But in truth it was precisely because Montrose and Dundee were not Highlanders, that they were able to lead armies composed of Highland clans. Had Montrose been chief of the Camerons, the Macdonalds would never have submitted to his authority. Had Dundee been chief of Clanronald, he would never have been obeyed by Glengarry. Haughty and punctilious men, who scarcely acknowledged the king to be their superior, would not have endured the superiority of a neighbour, an equal, a competitor. They could far more easily bear the preeminence of a distinguished stranger, yet even to such a stranger they would allow only a very limited and a very precarious authority. To bring a chief before a court martial, to shoot him, to cashier him, to degrade him, to reprimand him publicly, was impossible.
Macdonald of Keppoch or Maclean of Duart would have struck dead any officer who had demanded his sword, and told him to consider himself as under arrest; and hundreds of claymores would instantly have been drawn to protect the murderer. All that was left to the commander under whom these potentates condescended to serve was to argue with them, to supplicate them, to flatter them, to bribe them; and it was only during a short time that any human skill could preserve harmony by these means. For every chief thought himself entitled to peculiar observance; and it was therefore impossible to pay marked court to any one without disobliging the rest. The general found himself merely the president of a congress of petty kings. He was perpetually called upon to hear and to compose disputes about pedigrees, about precedence, about the division of spoil. His decision, be it what it might, must offend somebody. At any moment he might hear that his right wing had fired on his centre in pursuance of some quarrel two hundred years old, or that a whole battalion had marched back to its native glen, because another battalion had been put in the post of honour. A Highland bard might easily have found in the history of the year 1689 subjects very similar to those with which the war of Troy furnished the great poets of antiquity. One day Achilles is sullen, keeps his tent, and announces his intention to depart with all his men. The next day Ajax is storming about the camp, and threatening to cut the throat of Ulysses.
Hence it was that, though the Highlanders achieved some great exploits in the civil wars of the seventeenth century, those exploits left no trace which could be discerned after the lapse of a few weeks. Victories of strange and almost portentous splendour produced all the consequences of defeat. Veteran soldiers and statesmen were bewildered by those sudden turns of fortune. It was incredible that undisciplined men should have performed such feats of arms. It was incredible that such feats of arms, having been performed, should be immediately followed by the triumph of the conquered and the submission of the conquerors. Montrose, having passed rapidly from victory to victory, was, in the full career of success, suddenly abandoned by his followers. Local jealousies and local interests had brought his army together. Local jealousies and local interests dissolved it. The Gordons left him because they fancied that he neglected them for the Macdonalds. The Macdonalds left him because they wanted to plunder the Campbells. The force which had once seemed sufficient to decide the fate of a kingdom melted away in a few days; and the victories of Tippermuir and Kilsyth were followed by the disaster of Philiphaugh. Dundee did not live long enough to experience a similar reverse of fortune; but there is every reason to believe that, had his life been prolonged one fortnight, his history would have been the history of Montrose retold.