It freed Cuba, gave americans something to consider, and gave practice for the army and navy
The war between Serbia and Austria was a nationalist in terms that both wanted to gain greater land for their country. Serbia wanted to have Bosnia and Herzegovina which were both under Austria. It declared war after Serbia refused to surrender the group who planned the <span>assassination of Archduke Ferdinand.
This kind of regional wars that involved territorial expansion pushed to World War I. Countries searched for allies and cooperated to have a greater military strength and support to defeat other countries they wanted to have. </span>
Nuclear weapons technology was developed during the Cold War, which makes it possible to launch missiles across vast distances and wage wars that create exponentially more damage than before.
Answer:
the answer is one. have slavery
