In order to stop the spread of Communism, the United States followed the policy of containment.
I am not sure what you exactly mean but is this something like
tides
longshore drifts
waves
It allowed African Americans to be able to vote
The British Empire was composed of the dominions, colonies, protectorates, mandates, and other territories ruled or administered by the United Kingdom and its predecessor states. It began with the overseas possessions and trading posts established by England between the late 16th and early 18th centuries.