following morning. The 4th Division fought its way through the villages of Metaxas and Rachovo. Upon reaching the Porta Pass it engaged in a bloody clash with the defenders, securing its objective at 5 p.m. The 5th Division and the Gennadis Evzone detachment were confronted by four Ottoman reserve battalions at Lazarades which held their ground until sunset. The commander of the cavalry brigade ordered his unit to encamp at Loudani, refusing to advance further because of the resistance offered by the Ottomans at Lazarades. Fearing that they would be encircled by the Konstantinopoulos Evzone detachment, the Ottomans began to withdraw at 7 p.m., towards their second defensive line at Hani 739, under the cover of the night. Before retreating they fired a 20-minute artillery barrage on Greek positions along the entire frontline. Unaware of the Ottoman retreat the Greeks failed to use the opportunity and cut their access to the bridge across the Haliacmon. Upon reaching their second defensive line, the Ottomans became aware of the 4th Divisions' seizure of Porta Pass and panic spread in their ranks and many soldiers fled, abandoning their equipment. On the morning of 10 October, the 4th Division charged down the northern slope of the Rahovo Mountain, surprising the Ottoman infantry and artillerymen who abandoned over twenty Krupp guns and engaged in a disorganized retreat. The Greek cavalry's indecision once again enabled the fleeing Ottomans to safely reach Servia and Kozani. Aftermath At 4 p.m. on 10 October, the 4th Division entered Servia, witnessing 75 to 90 severed human heads belonging to local Christians lined up on either side of one of its streets. Following the declaration of war local authorities had detained all the Christian dignitaries from Servia and the surrounding villages with the intention of massacring them, a plan that was thwarted by Ottoman officer Omer Bey. However, upon realizing the imminent defeat of the Ottoman troops at Sarantaporo, the town's Muslim population massacred 117 local Christians. By 11 October, the entirety of the Army of Thessaly had reached the banks of the Haliacmon, while the Greek cavalry entered Kozani unopposed, opening the way for the Greeks to advance towards the Greek majority city of Thessaloniki and assist the Serbs at Monastir. On 13 October, the Greek army transferred its general headquarters to Kozani; the following day King George I arrived in the city, ordering the army to march towards Thessaloniki