When the advance was renewed the First Army left behind the entire 3rd division around Adrianople to protect against attacks from the right flank. The Ottoman Army meanwhile had consolidated and reinforced itself on a new line from Lule Burgas to Bunar Hisar. The Bulgarians decided to carry out a frontal assault with the Third Army while the weakened First Army tried to enveloped the Ottoman left flank. This largest and bloodiest battle of the Balkan Wars the Bulgarians again emerged victorious and the Ottoman forces retreated in complete disorder. The heavy fighting inflicted around 20,000 casualties to the Bulgarian forces which again forced the Bulgarian command to order a couple of days' rest for the armies.