Answer:
Austria-Hungary had invaded Serbia, and Russia was in an alliance with Serbia.
I believe the answer is: "African Americans increased their push for civil rights on the home front"
The sentiment was initially made by African Americans who were being blatantly discriminated by the white citizens, in both job fields, education, or even the usage of public properties. This became the reason for the push for civil rights which finally realised by the The Civil Rights Act of 1964
