Negotiations of Bulgaria with the Central Powers and the Entente

The Negotiations of Bulgaria with the Central Powers and the Entente were attempts of the two belligerents in World War I, the Central Powers and the Entente to involve Bulgaria in the war on their side. They are also called The Bulgarian Summer of 1915.

Source: Wikipedia — Negotiations of Bulgaria with the Central Powers and the Entente (CC BY-SA 4.0)