The number of the malcontents daily increased; and they even attempted by letters, (which were fortunately intercepted,) to seduce the armies on the Rhine and in Saxony. Neither the representations of Bernard of Weimar, nor the stern reproaches of his harsher associate in command, could suppress this mutiny, while the vehemence of Horn seemed only to increase the insolence of the insurgents. The conditions they insisted on, were that certain towns should be assigned to each regiment for the payment of arrears. Four weeks were allowed to the Swedish Chancellor to comply with these demands; and in case of refusal, they announced that they would pay themselves, and never more draw a sword for Sweden.
These pressing demands, made at the very time when the military chest was exhausted, and credit at a low ebb, greatly embarrassed the chancellor. The remedy, he saw, must be found quickly, before the contagion should spread to the other troops, and he should be deserted by all his armies at once. Among all the Swedish generals, there was only one of sufficient authority and influence with the soldiers to put an end to this dispute. The Duke of Weimar was the favourite of the army, and his prudent moderation had won the good-will of the soldiers, while his military experience had excited their admiration. He now undertook the task of appeasing the discontented troops; but, aware of his importance, he embraced the opportunity to make advantageous stipulations for himself, and to make the embarrassment of the chancellor subservient to his own views.
Gustavus Adolphus had flattered him with the promise of the Duchy of Franconia, to be formed out of the Bishoprics of Wurtzburg and Bamberg, and he now insisted on the performance of this pledge. He at the same time demanded the chief command, as generalissimo of Sweden. The abuse which the Duke of Weimar thus made of his influence, so irritated Oxenstiern, that, in the first moment of his displeasure, he gave him his dismissal from the Swedish service. But he soon thought better of it, and determined, instead of sacrificing so important a leader, to attach him to the Swedish interests at any cost. He therefore granted to him the Franconian bishoprics, as a fief of the Swedish crown, reserving, however, the two fortresses of Wurtzburg and Koenigshofen, which were to be garrisoned by the Swedes; and also engaged, in name of the Swedish crown, to secure these territories to the duke. His demand of the supreme authority was evaded on some specious pretext. The duke did not delay to display his gratitude for this valuable grant, and by his influence and activity soon restored tranquillity to the army. Large sums of money, and still more extensive estates, were divided among the officers, amounting in value to about five millions of dollars, and to which they had no other right but that of conquest. In the mean time, however, the opportunity for a great undertaking had been lost, and the united generals divided their forces to oppose the enemy in other quarters.