Complex sentence: Furthermore, Frederick could still terrify the Austrians simply by showing up; on 5 November, the anniversary of the infamous Rossbach, Frederick marched toward Neisse, causing the Austrians to abandon their siege.
Split into simpler sentences: Furthermore, Frederick could still terrify the Austrians simply by showing up. On 5 November, the anniversary of the infamous Rossbach, Frederick marched toward Neisse, causing the Austrians to abandon their siege.