Why did Bulgaria attack its former Allies? (The Second Balkan war)

Just weeks after defeating the Ottoman Empire in the First Balkan War, the victory alliance imploded. In June 1913, Tsar Ferdinand of Bulgaria ordered a surprise attack on his former allies, Serbia and Greece. Why did Bulgaria turn on the very nations it had just fought alongside, launching a war that left it completely surrounded on all four fronts? #History #BalkanWars #Bulgaria #MapAnimation #MilitaryHistory Video Tags: Second Balkan War 1913 map, Why Bulgaria attacked its allies, First vs Second Balkan War history, Partition of Macedonia 1913 map, Tsar Ferdinand Bulgaria mistake, Battle of Bregalnica, Secret Serbian Greek alliance 1913, Why Romania invaded Bulgaria, Ottoman Empire retakes Edirne Adrianople, Treaty of Bucharest 1913, How Balkan Wars caused WWI, General Mikhail Savov, Bulgarian Army Macedonia, Map Animation, Historical Mapping, World War 1 precursor.