Complex sentence: The battle started with a failed Austrian surprise attack on the outnumbered Prussians, despite initial setbacks the Prussian army managed to defeat the Austrians, due to an unexpected attack from a reserve regiment that refused to follow Frederick's orders.
Split into simpler sentences: The battle started with a failed Austrian surprise attack on the outnumbered Prussians. Despite initial setbacks the Prussian army managed to defeat the Austrians, due to an unexpected attack from a reserve regiment that refused to follow Frederick's orders.