The union of Bukovina with Romania was declared in 28 November 1918, being officially recognized by the international community in 1919 and 1920.

Timeline of events

1918

• 22 October - Constantin Isopescu-Grecul, a Bukovinian Romanian deputy in the Austrian Imperial Council, warns the authorities in Vienna that if they do not force Budapest to release Transylvania and other Romanian-inhabited areas from Hungary, then the Romanian subjects of the empire would have to look for outside help.^[1]
• 25 October - The Ukrainian National Committee for Bukovina is formed.^[1]
• 27 October - The Romanian National Council is formed under the leadership of Iancu Flondor.^[1]
• 3 November - The Ukrainian National Rada takes control of the state apparatus in Czernowitz and the surrounding area.^[2]
• 4 November - Aurel Onciul, a Romanian Bukovinian politician, concludes an agreement (not authorized by the Romanian National Council) with the Ukrainian National Committee providing for the division of Bukovina along ethnic lines and joint Romanian-Ukrainian control over Czernowitz (the capital of Bukovina).^[1]
• 6 November - The Ukrainian National Committee occupies all Government buildings in Czernowitz and Omelian Popowicz is proclaimed President of "Ukrainian Bukovina".^[3]
• 7 November - Iancu Flondor appeals to the Romanian Government to occupy the entire land of Bukovina.^[1]
• 9/10 November - Romania re-declares war on the Central Powers (the May 1918 Treaty of Bucharest put an end to the first Romanian Campaign).^[1][4]
• 10 November - The Ukrainian National Committee together with its military supporters retreat from Czernowitz.^[3]
• 11 November - Czernowitz (claimed by the West Ukrainian People's Republic) is seized by the Romanian Army.^[1][5][3]
• 12 November - The Romanian National Council establishes a new government in Bukovina under Flondor's presidency.^[1]
• 28 November - The Romanian National Council, together with Polish and German representatives, convokes the General Congress of Bukovina which requests the union of Bukovina with Romania.^[1][6]
• 19 December - The Romanian Government issues a decree formalizing Bukovina's annexation.^[1]

1919

• 10 September - The Treaty of Saint-Germain-en-Laye is signed, recognizing Romanian sovereignty over Bukovina (the frontiers of Romania were to be later fixed).^[7][8][9]

1920

• 10 August - The Treaty of Sèvres established the Romanian-Polish boundary (mainly, based on the July 1919 Lwów Convention).^[8][10]

Aftermath

Since 2015, Bukovina Day is celebrated in Romania every 28 November to commemorate the union of the region with Romania.^[11]

Gallery

• 
  Bukovina within Austria-Hungary
• 
  Flag of Bukovina
• 
  Division of Bukovina (orange) as claimed by the West Ukrainian People's Republic (black interrupted line)
• 
  Ethnic map of Bukovina (purple = Romanians, green = Ukrainians)
• 
  Iancu Flondor