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| 1912 | Alliance Pasic, Nicola |  |
| Belgrade Greece, Serbia, Bulgaria & Montenegro form a Balkan League |
| 1912 | Balkan League Pasic, Nicola | |
| !3 Mar A secret bilateral defensive Alliance is agreed between Serbia and Bulgaria |
| 8th Oct The first state to declare war is Montenegro, starting the First Balkan War |
| 1912 | Battle of Elle Pasic, Nicola | |
| Dec Elle Following a ceasefire in December between the Ottoman Empire and Bulgaria, Serbia and Montenegro, the Turkish fleet twice exited the Dardanelles but was twice defeated in the battles of Elle and Lemnos |
| 1912 | Battle of Kumanovo Putnik, Radomir | |
| 24th Oct Kumanovo Defeats a Turkish covering force |
| 1912 | Battle of Lemnos Pasic, Nicola | |
| Dec Lemnos Following a ceasefire in December between the Ottoman Empire and Bulgaria, Serbia and Montenegro, the Turkish fleet twice exited the Dardanelles but was twice defeated in the battles of Elle and Lemnos |
| 1912 | Battle of Monastir Putnik, Radomir | |
| 5th Nov Monastir About 20,000 Turks are killed or captured |
| 5th Nov Monastir The remaining forces retreat to Yanina |
| 1912 | Invasion of Macedonia Putnik, Radomir | |
| Belgrade Leads three Serbian Armies into Macedonia |
| 1912 | Invasion of Turkey Pasic, Nicola | |
| Belgrade Members of the Balkan League attack Turkey & win quick victories |
| Serbia attacks south Skopje and Bitola |
| 1912 | Partition Pasic, Nicola | |
| Macedonia Serbia & Bulgaria agree to partition Macedonia, still part of the Turkish Empire |
| 1912 | Rule of Macedonia Pasic, Nicola | |
| Macedonia Serbia & Bulgaria agree to partition Macedonia |
| 1912 | Rule of Varda Pasic, Nicola | |
| Varda Serbia and Bulgaria sign treaties to split the land of Vardar Macedonia |
