after the assassination of the austrian archduke, which happened first?\ngermany invaded belgium.\ngreat…

after the assassination of the austrian archduke, which happened first?\ngermany invaded belgium.\ngreat britain invaded germany.\nrussia declared war on serbia.\naustria declared war on serbia.

after the assassination of the austrian archduke, which happened first?\ngermany invaded belgium.\ngreat britain invaded germany.\nrussia declared war on serbia.\naustria declared war on serbia.

Answer

Answer:

D. Austria declared war on Serbia.

Brief Explanations:

After the assassination of Austrian archduke Franz - Ferdinand in 1914, Austria - Hungary issued an ultimatum to Serbia. When Serbia did not fully comply, Austria declared war on Serbia on July 28, 1914. This was an early event that led to the start of World War I. Germany invaded Belgium later as part of the Schlieffen Plan. Great Britain did not invade Germany first. Russia mobilized in support of Serbia and later declared war on Austria - Hungary, not on Serbia.