The same antagonisms which had kept the Indian tribes in hostility with each other prevented their effective alliance among themselves against the whites, and also embarrassed the English and French rivals, who sought to engage them on their respective sides. Many attempts were made by master chiefs among the savages, from the first intrusion of the Europeans, to organize combinations, or what we call “conspiracies,” of formerly contending tribes against the common foe. The first of them, formidable though limited in its consequences, was made in Virginia in 1622. Only two of these schemes proved otherwise than wholly abortive. That of King Philip in New England, in 1675, was effective enough to show what havoc such a combination might work. That of Pontiac, in 1763, was vastly more formidable, and was thwarted only by a resistance which engaged at several widely severed points all the warlike resources of the English. But the inherent difficulties, both of combining the Indian tribes among themselves, and of engaging some of them in alliance on either side with the French and the English contestants, were vastly increased by the seeds of sharp dissension sown among them through the rivalries in trade and temptations offered in the fluctuating prices of peltries. Even the long-standing league of the Five Nations was ruptured by the resolute English agent Johnson. He succeeded so far as to secure a promise of neutrality from some of them, and a promise of friendly help from one of them. There were some in each of the tribes falling not one whit behind the sharpest of the whites in skilled sagacity and calculation, who were swift to mark and to interpret the changes in the balance of fortune, as one or the other of the parties of their common enemies made a successful stroke for ascendency.