What does the monroe doctrine prohibit?

The Monroe Doctrine prohibited the involvement of the European nations in the Western Hemisphere, which if done, will be deemed as a hostile act of threat.

Explanation:

The Monroe Doctrine of the United States was a doctrine or set of rules that were made during the time of President James Monroe at his State of the Union Address to the Congress. In his speech, he emphasized on the need for a separate and yet binding law that will ensure the European nations will have no attempts to try to hold power or colonize any place in the American regions.

In this doctrine, it stated that the European nation has no right or obligation to interfere in the Western hemisphere. If this is to occur, then it will be accepted as an act of hostility, to which the United States will be forced to retaliate. It also stated that the U.S. will not interfere in any of the political situations or wars among the European powers, and that it will keep clear of any control over the existing colonies in it. It also prohibited the further colonization of the Western Hemisphere, claiming it is closed for any more colonization.

1960: wilma rudolph was the first woman to win three olympic gold medals in track and field at one olympic games. she was an american sprinter from tennessee, she was acclaimed the fastest woman in the world. she was among the most visible black women in america and abroad. she became a role model for black and female athletes. she was also known as a civil rights and women right's pioneer.

1973: billy jean king is an american former number one tennis player. she represented the united states in the federal cup and the wightman cup. for three years she was the usa's captain in the federation cup. she defends gender equality and has been a pioneer for equal and social justice. at the age of 29, she won "the battle of sexes" tennis match against the 55 year old bobby riggs. she was also the founder of women's tennis association and the women's sports foundation.  

1983: tamara mckinney becomes the first american female skier to win the alpine world cup overall championship top. she was the only american to hold that title for a quarter century until 2008.

1992: manon rhéaume, from canada,   becomes the only woman to start in a national hockey league game in an exhibition game for the tampa bay lightning . she played on the canada women's national ice hockey team winning gold medals in 1992 and 1994. and silver medals in 1998. manon marked the first time a woman appeared in a regular season professional game with her first appearance against the salt lake golden eagles.

2013: serena williams won 78 of 82 matches at the age of 31. she is an american professional tennis player. she reached the number 1 ranking for the first time on july, 8, 2002. at the age of 16, she played against karsten braasch the battle of sexes. she was the highest paid female athlete in 2016. she is a unicef ambassador .