The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. ... When Russia began to mobilize due to its alliance with Serbia, Germany declared war on Russia.
Basically, militarism, a country's glorifying of its own military, can cause countries to become arrogant and power-hungry, as well as competitive for such power.
1.A 2.B 3.B 4.C 5.A 6.D 7. C and E 8.C 9.B 10.C 11.B 12.B 13. Successes: direct election, and creation of federal income tax, Failures: 16-to-1 silver-to-gold, government control of railroads