Reconstruction period The period after the Civil War, 1865 - 1877, was called the Reconstruction period. Abraham Lincoln started planning for the reconstruction of the South during the Civil War as Union soldiers occupied huge areas of the South.
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. In June 1914, a Serbian-nationalist terrorist group called the Black Hand sent groups to assassinate the Archduke.
