Answer:
para esa pregunta lo que pide cuanto tiempo duro la respuesta es - la primera guerra mundial duro 4 anos
Explanation:
Franz Ferdinand's assassination led to the July Crisis and precipitated Austria-Hungary's declaration of war against Serbia, which in turn triggered a series of events that eventually led to Austria-Hungary's allies and Serbia's allies declaring war on each other, starting World War I.
Answer:
James Buchanan is the 15th president of the United States.
