 Complete the following phrase:  Nevertheless, the Greeks advanced and took Preveza on 21 October 1912, and repulsed an Ottoman counteroffensive in the Battle of Pente Pigadia on 2430 October. Operations subsequently stalled as both sides awaited reinforcements. With the arrival of the 2nd Infantry Division, the Greeks resumed their offensive towards Ioannina on 12 December. Despite early success and the capture of Aetorrachi ridge, the Greek assault faltered against the guns of Bizani and successive Ottoman counter-offensives. The offensive was over by December 10, and operations degenerated into positional warfare. As more forces were being pulled from Macedonia towards Epirus, Crown Prince Constantine came to assume command in Epirus in January 1913, while Sapountzakis was relegated to command a detachment comprising the 6th and 8th Infantry Divisions. From this post he participated in the final 