<span>December 7, 1917.
Already at war with Germany, the United States officially declared war on Austria-Hungary; the US never declared war on the other two Central Powers, the Ottoman Empire and Bulgaria.</span>
Answer:While Brazil maintained its territorial integrity after independence, the former Spanish America split into more than a dozen separate countries, following the administrative divisions of the colonial system. The difficulty for the inhabitants of these units was not, however, as simple as the demarcation of geographic boundaries. Rather, the recently emancipated countries of Latin America faced the much more daunting challenge of defining and consolidating new nations.
Explanation:
