The Adventures of Young Indiana Jones Documentaries

The Archduke's Last Journey - End of an Era (1x13)

:

In June 1914, a special train carried Archduke Franz Ferdinand, heir to the Austrian throne, to Sarajevo. Terrorists would strike, and a 19-year old gunman killed the Archduke and his wife. A chain-reaction disaster followed, as a web of diplomatic alliances dragged the world into a war that would kill millions, maim millions more, and bring an end to royal dominance of Europe.