What factors led to the united states entering world war 2?

The event that led to the United States entering World War II was the Japanese bomb attack of the Pearl harbor in Hawaii. This attack demanded U.S. entry into the war to defeat the aggressors.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

realmente cosas malas! ¡la explicación está abajo, para más recursos siga el enlace!

  en la francia revolucionaria, la asamblea legislativa vota para abolir la monarquía y establecer la primera república. la medida se produjo un año después de que el rey luis xvi aprobara a regañadientes una nueva constitución que lo despojó de gran parte de su poder.

aquí está el enlace: https: //

espero que esto te ayude, pero solo para hacerte saber, el sitio web no está en español. si quieres que lo traduzca solo tienes que preguntar.