The belligerents in the Crimean War were primarily Russia, France, the Ottoman Empire, the British Empire and Sardinia, although it should be noted that there were smaller factions fighting as well.
To protect settlers in New Mexico the Spanish paid Comanche and Navajo allies to attack the Apaches.
That it was obvious that God wanted the USA to expand and take over the whole of the North American continent.<span>
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Demands by Cuban patriots for independence
Answer:
because they had everything they need