Peace
Bulgaria agrees an armistice with the Allies
Role range: 1914-1918 – 1918-1943
Historical biography archive · Updated 2026-11-03
Boris III Biography and Timeline
Follow Boris III through 17 dated historical records for Bulgaria.
Boris III, historical timeline
A chronological timeline drawn from matching World History Database records.
17Distinct records
1 of 1Page
1918–1943Years on this page
1918
Result of Surrender of Bulgaria
Bulgaria leaves the war, opening the Balkans further to Allied advance.
Role range: 1914-1918 – 1918-1943
Surrender of Bulgaria
Bulgarian hostilities cease as Bulgaria agrees to the Allied terms
Role range: 1914-1918 – 1918-1943
Succession
Succeeds as King of Bulgaria
Role range: 1918-1943
1919
Treaty of Neuilly
Concludes a peace Treaty with the Allies
Role range: 1914-1918 – 1918-1943
1924
Plot
Failed attempt to assassinate Boris III, leads to pogroms against the left
Role range: 1918-1943
Pogroms
Failed attempt to assassinate Boris III, leads to pogroms against the left
Role range: 1918-1943
1934
Constitution of Bulgaria
The fascist Zuevno movement drives out Boris III but he returns as a royal dictator
Role range: 1918-1943
Zuevno
The fascist Zuevno movement drives out Boris III but he returns as a royal dictator
Role range: 1918-1943
Coup
Sets up a military coup in the hope of setting up a military dictatorship
Role range: 1918-1943
1941
Alliance Boris III and Tripartite Pact
Bulgaria joins the Tripartite Pact
Role range: 1939-1945 – 1918-1943
Pact between Germany, Italy, Japan and Bulgaria
Bulgaria joins the Tripartite Pact
Role range: 1939-1945 – 1918-1943
Tripartite Pact
Bulgaria joins the Tripartite Pact
Role range: 1939-1945 – 1918-1943
1942
Declaration of War
USA declares war on Bulgaria, Hungary and Romania
Role range: 1939-1945 – 1918-1943
1943
Assassination of Boris III
Murdered by the Nazis, his removal leads to a Nazi coup
Role range: 1939-1945 – 1918-1943
Coup
Murdered by the Nazis, his removal leads to a Nazi coup
Role range: 1939-1945 – 1918-1943
Death of Boris III
Death of Boris III, assassinated
Role range: 1939-1945 – 1918-1943
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.