While on a campaign in Bulgaria, the Romanian Army suffered a cholera outbreak that led to around 1,600 deaths.

The Second Balkan War was a conflict fought between Bulgaria and its former Balkan League allies, Serbia and Greece, who were later joined by Romania and the Ottoman Empire. The war began when Bulgaria, unhappy with the division of territory after the First Balkan War, launched attacks on Serbian and Greek forces, who repelled the offensive and pushed into Bulgarian territory. With most of Bulgaria’s army committed in the south, Romania intervened from the north. The Ottoman Empire also took advantage of the situation to recover territories lost the previous year.

The 1913 Romanian Army cholera outbreak was a cholera outbreak the Romanian Army suffered during the Second Balkan War of 1913 against the Kingdom of Bulgaria. This conflict was part of the Balkan Wars of 1912 and 1913. As Bulgaria was then fighting with Greece and Serbia, the invasion by Romania, which had a geographic and strategic advantage, was met with minimal Bulgarian resistance.