| 35,000 dead or wounded|
Bregalnitsa-Strumica operation Wikipedia
The Bregalnitsa-Strumica operation (Bulgarian: Брегалнишко-Струмишка операция) was an offensive operation of Bulgarian Army during World War II. It was held by Fourth Bulgarian army from 15 October to 14 November 1944 and was aimed to secure the left flank of the First Bulgarian Army, blocking the way for retreat of the German group armies 'E' from Greece. The onslaught of the Army began on October 15. After breaking the enemy resistance its forces entered Kocani, and later seized the region of Štip. This allowed them to go in pursuit of retreating to the valley of the river Vardar German troops. On November 10, it took control over Veles and three days later assisted the First Bulgarian Army in Stratsin-Kumanovo operation for taking Skopje.