After Frederick had forced the surrender of Saxony in the 1756 campaign, he spent the winter devising new plans for a defence of his small kingdom. It was not in his nature, nor in his military strategy, simply to sit back and defend. He began drawing up plans for another bold stroke against Austria. On the 6th of May, around 5 am, the Prussian army assembled to the north on the Prosek heights, 115,000 men strong, and Frederick sent Keith with 30,000 to the west of the town to cut off any Austrian retreat. The Austrians drew up for battle facing north and east.