What key event led to the outbreak of World War I?
A.
the rise of a fascist German chancellor
B.
the assassination of an Austrian archduke
C.
invasion of Vienna by Serbs
D.
the seizure of Romania by Bulgaria
1 answer
B. the assassination of an Austrian archduke (Archduke Franz Ferdinand) by a Serbian nationalist in Sarajevo, Bosnia, on June 28, 1914, which triggered a series of alliances and diplomatic tensions among European powers and ultimately led to the outbreak of World War I.
1 answer