Answer: World War I Begins
On July 28, Austria-Hungary declared war on Serbia, and the tenuous peace between Europe's great powers quickly collapsed.
Explanation:
Answer: The very first cities were founded in Mesopotamia after the Neolithic Revolution, around 7500 BCE. ... units, as well as how trade routes allowed certain cities to expand and grow ... Discuss the problems urbanization created for newly formed cities ... The growth of modern industry from the late 18th century onward led to ...
Should be nation(s).
Austria, Hungary, Czechoslovakia, and Yugoslavia.