Final answer:
Austria and Prussia went to war against France during the French Revolution and the Napoleonic Wars for different reasons, including preventing the spread of revolutionary ideas and defending their territories against Napoleon's expansionist ambitions.
Step-by-step explanation:
Austria and Prussia went to war against France for different reasons during the French Revolution and the Napoleonic Wars. Initially, Prussia joined Austria to prevent the spread of revolutionary ideas and to protect the existing monarchical order in Europe. However, as the French Revolutionary and Napoleonic Wars progressed, both Austria and Prussia became targets of Napoleon's expansionist ambitions, leading to direct conflicts between them and revolutionary France.