add boundery of the United States (1783-1803) part 2

add boundery of the United States (1783-1803) part 1

improve the border with Finland and Russia using data from Geonorge (Norway (1905- ))

improve the border with Finland and Russia using data from Geonorge (Norway (1905- ))

improve the border with hungary, a sixth time (Romania (1881-1913))

improve the border with hungary, a fifth time (Romania (1881-1913))

improve border of the Principality of Montenegro (1852-1910)

improve the border with hungary, a forth time (Romania (1881-1913))

improve the border with hungary, a third time (Romania (1881-1913))

improve the border with hungary, some more (Romania (1881-1913))

improved border with hungary (Romania (1881-1913))

added border with Turkey (Soviet Union (1951-1991))

added the Kuril Islands (Soviet Union (1951-1991))

add partial bounderies for the Soviet Union (1951-1991)

fix part of the boundery (Tsardom of Bulgaria (1908-1913))

add missing part of the boundery (Tsardom of Bulgaria (1908-1913))

added tsardom of Bulgaria (1908-1913)

add partial bounderies for the Taurida Governorate

add missing part of the boundery (Kingdom of Romania (1921-1940))

add missing part of the boundery (Hungary (1867-1918)), again