Answer:
They constructed strong cities with walls.
Explanation:
On June 28, 1914, in an event that is widely regarded as sparking the outbreak of World War I, Archduke Franz Ferdinand, heir to the Austro-Hungarian empire, was shot to death with his wife by Bosnian Serb Gavrilo Princip in Sarajevo, Bosnia.
Answer:
New constitutions ended many social distinctions and abolished slavery.
