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However, feudalism decline mainly begun when feudal lords were allowed to pay armies rather than fight themselves in the battles. More also, the black death made labor scarce and worthy commodity, at the same time when the peasants migrated to urban areas. Emergence of new towns, and trade opportunities also entrenched the kings powers and made the government centralized. other factors included the crusades and the age of exploration.
Answer:1800–1842. 1821: Spain cedes Florida to United States (Adams–Onís Treaty).
The Cold War was a period of geopolitics tension between the Soviet Union and the United States and their respective allies.
