The Great Union () or Great Union of 1918 () is the name under which Romanian historians or Romanians in general commonly refer in Romanian historiography to the series of political unifications the Kingdom of Romania had with several of the so-called Romanian historical regions, starting with Bessarabia in 27 March 1918, continuing with Bukovina in 28 November 1918 and finalizing with Transylvania (on its broad meaning) in 1 December 1918 with the declaration of the union of this region with Romania in the city of Alba Iulia. Romanians also consider several other events as preludes to the Great Union, such as the unification of Moldavia and Wallachia (also known as the Little Union, ) in 1859 or the independence of the country and the annexation of Northern Dobruja in 1878, and also the occupation of Transylvania and Moldavia by the Prince of Wallachia Michael the Brave in 1600.