Bulgaria–Germany treaty (1915)

The Treaty for friendship and alliance between Bulgaria and Germany^{[citation needed]} was a secret military treaty signed on 6 September (24 August O.S.) 1915 between the Kingdom of Bulgaria and the German Empire, establishing an alliance between the two powers.^[1] Besides aligning Bulgaria with the Central Powers, the treaty granted Bulgaria territorial expansion towards Serbia.^[2]

Bulgaria with us – A German postcard commemorating the entering of Bulgaria in the war.