These forces were small in view of the momentous nature of the struggle before them and the fact that two great generals, both hitherto invincible, were now to be matched in a contest on which the fate of the whole war largely depended and to which the two parties battling for the mastery looked forward with fear and trembling. But of the two, while Gustavus was cool and collected, Tilly seemed to have lost his usual intrepidity. He was anxious to avoid battle, and had formed no regular plan to fight the enemy when forced into it by Pappenheim's impetuous charge. "Doubts which he had never before felt struggled in his bosom; gloomy forebodings clouded his ever-open brow; the shade of Magdeburg seemed to hover over him."
The lines being ready for action, King Gustavus rode to the centre of his front, reined in his horse, took off his hat, and with the sword in his right hand lowered to the ground, offered in a loud voice the following prayer:
"Almighty God, Thou who holdest victory and defeat in the hollow of Thine hand, turn Thine eye unto us Thy servants, who have come from our distant homes to fight for freedom and truth and for Thy gospel. Give us victory for the honor of Thy holy name. Amen!"
Then, raising his sword and waving it over his head, he commanded:
"Forward in the name of the Lord!"
"God with us!" was the battle-cry as the Swedes, inspired by his words, prepared for the fatal fray.
The battle, which had lulled after the defeat of Pappenheim, was now resumed with the thunder of the cannon, which continued for two hours, the west wind meanwhile blowing clouds of smoke and dust from ploughed and parched fields into the faces of the Swedes. To avoid this they were wheeled to face northwards, the movement being executed so rapidly and skilfully that the enemy had no time to prevent it.
The cannonading ending, Tilly left the shelter of the heights and advanced upon the Swedes. But so hot was their fire that he filed off towards the right and fell impetuously upon the Saxons, whose ranks quickly broke and fled before the fierce charge. Of the whole force of the elector only a few regiments held their ground, but these did so in a noble manner that saved the honor of Saxony. So confident now was Tilly of victory that he sent off messengers in all haste to Munich and Vienna with word that the day was his.
He was too hasty. The unbroken army of Sweden, the most thoroughly drilled body of soldiers then in Europe, was still to be dealt with. Pappenheim, who commanded the imperial left, charged with his whole force of cavalry upon the Swedish right, but it stood against him firm as a rock. Here the king commanded in person, and repulsed seven successive charges of the impetuous Pappenheim, driving him at last from the field with broken and decimated ranks.
In the meantime Tilly, having routed the small remnant of the Saxons, turned upon the left wing of the Swedes with the prestige of victory to animate his troops. This wing Gustavus, on seeing the repulse of his allies, had reinforced with three regiments, covering the flank left exposed by the flight of the Saxons.