y when the
complete subjugation of Bohemia left him without excuse, and the
conquests of Gustavus Adolphus in Bavaria threatened Austria itself,
that he yielded to the pressing entreaties of the Elector and the
Emperor, and determined to effect the long-expected union with the
former; an event, which, according to the general anticipation of the
Roman Catholics, would decide the fate of the campaign.

Gustavus Adolphus, too weak in numbers to cope even with Wallenstein's
force alone, naturally dreaded the junction of such powerful armies, and
the little energy he used to prevent it, was the occasion of great
surprise. Apparently he reckoned too much on the hatred which alienated
the leaders, and seemed to render their effectual co-operation
improbable; when the event contradicted his views, it was too late to
repair his error. On the first certain intelligence he received of
their designs, he hastened to the Upper Palatinate, for the purpose of
intercepting the Elector: but the latter had already arrived there, and
the junction had been effected at Egra.

This frontier town had been chosen by Wallenstein, for the scene of his
triumph over his proud rival. Not content with having seen him, as it
were, a suppliant at his feet, he imposed upon him the hard condition of
leaving his territories in his rear exposed to the enemy, and declaring
by this long march to meet him, the necessity and distress to which he
was reduced. Even to this humiliation, the haughty prince patiently
submitted. It had cost him a severe struggle to ask for protection of
the man who, if his own wishes had been consulted, would never have had
the power of granting it: but having once made up his mind to it, he
was ready to bear all the annoyances which were inseparable from that
resolve, and sufficiently master of himself to put up with petty
grievances, when an important end was in view.

But whatever pains it had cost to effect this junction, it was equally
difficult to settle the conditions on which it was to be maintained.
The united army must be placed under the command of one individual, if
any object was to be gained by the union, and each general was equally
averse to yield to the superior authority of the other. If Maximilian
rested his claim on his electoral dignity, the nobleness of his descent,
and his influence in the empire, Wallenstein's military renown, and the
unlimited command conferred on him by the Emperor, gave an equally
stro