In 1908 Nerezov was appointed Chief of the Operations Department of the Army Staff and as such took part in the preparations for the war against the Ottoman Empire in 1912.

Bulgaria didn't have a general plan for a war against its former allies so in May colonel Nerezov submitted his suggestions for approval by the High Command.

In them he planned a simultaneous attack by all five Bulgarian armies with the bulk of the forces directs against Macedonia while the rest drive deep into the prewar borders of Serbia in order to cut its supply and communication lines.

The Bulgarian Army which was stretched on a 350 km front with all its forced arrayed in a single line had little reserves to prevent a breakthrough at the Battle of Dobro Pole.

The fighting was hard but unlike other sectors of the front the Bulgarian troops kept their high morale and battle readiness due to the personal visits of the commander of the army on the battlefield.

As a result, the Bulgarians achieved an important victory which encouraged general Nerezov to begin preparations for a counter-attack with his army.

However the Senior German and Bulgarian commanders were overwhelmed by the Dobro Pole debacle and feared giving a last general battle with all available forces.

Instead the First Army was ordered to retreat and for the remaining days of the war it was pursued by the British and fought only small rearguard battles.