Why are the men tied together ? What does the ties represent ? In Monroe doctrine

What event brought the us into wwii? what conflicts happened after the us entered the war? i know the first part of this question, i need with the second part.

The california gold rush: actually had only a small impact on california’s population because its rich farmlands already attracted thousands of new settlers each year. attracted almost equal numbers of men and women. resulted in laws that discriminated against “foreign miners.” made considerable wealth for average miners because gold mining demanded no real investment of capital. hurt the development of san francisco because gold discoveries shifted interest to areas outside of town.

Match the leaders with their goals at the yalta conference of 1945. franklin roosevelt winston churchill joseph stalin wanted to prevent future threats from germany wanted free elections in eastern europe wanted soviet against japan