In 1860 von Fransecky was attached to Oldenburg where he commanded an Oldenburgian infantry regiment.

During the Franco-Prussian War the Prussian 2nd Corps was part of the German 2nd army commanded by Prince Friedrich Karl.

On 2 December 1870 Ducrot tried to break through the German ring at Villiers but the sortie was stopped by troops under Fransecky.

In January 1871 2nd Corps was detached from the siege and placed under command of Edwin von Manteuffel's newly formed Army of the South.

Under Manteuffel's command Fransecky took part in the operations in the Côte-d'Or and Jura against Bourbaki's Armée de l'Est.