How did the crisis evoke the Monroe Doctrine?

During the Cold War era, President John F. Kennedy invoked the Monroe Doctrine. during the 1962 Cuban Missile Crisis, when he ordered a naval and air quarantine of Cuba after the Soviet Union began building missile-launching sites there.

The Monroe Doctrine was drafted because the U.S. government was worried that European powers would encroach on the U.S. sphere of influence by carving out colonial territories in the Americas.

the Monroe doctrine was caused by the emancipation of Spanish countries.

Explanation:

By the early 1820s, many Latin American countries had won their independence from Spain or Portugal, with the U.S. government recognizing the new republics of Argentina, Chile, Peru, Colombia, and Mexico in 1822. Yet both Britain and the United States worried that the powers of continental Europe would make future attempts to restore colonial regimes in the region. Russia had also inspired concerns of imperialism, with Czar Alexander I claiming sovereignty over the territory in the Pacific Northwest and banning foreign ships from approaching that coast in 1821