What led the North Korean government to invade South Korea?

In 1945 Korea had been divided along the 38th parallel, its industrial north being occupied by the Soviets and the agricultural south by the Americans. Korean leaders wanted a quick reunification, but only on their own terms, and the Communists taking power in the north did not see eye to eye with the nationalists whom the Americans supported in the south. With reunification on hold, in 1948 the Americans and the Soviets respectively recognized the governments in their zone as having authority for the whole country. Soviet and American forces both withdrew, but North Korean forces invaded the south in June 1950 with Stalin’s foreknowledge and approval. Within two days President Truman had sent American forces to fight them, acting in the name of the United Nations. The Security Council had voted to resist aggression, and as the Soviets were at that moment boycotting the Council, they could not veto United Nations action.

Explanation:

The conflict escalated into warfare when North military (Korean people Army,KPA) forces-supported by the Soviet union and China crossed the border and advanced into South Korea on 25 June 1975

a hypothesis is an expected answer to a question, usually based on some theory or prior research. hypothesis testing is a method of determining the viability of a hypothesis. let’s use the us presidential election as an example. there are many hypotheses (questions) about how people feel or whom they will vote for. the only way to know the 100% “truth” about the answers to these questions is to ask every single possible voter – something that is impossible, expensive, time consuming etc. instead, we take samples and use statistics to make “best guesses” about the answer to a particular hypothesis. we never know for sure if our conclusion is right at the time we accept/reject it, but these techniques, when used appropriately can get us close to the truth most of the time (which is a lot better than guessing, flipping coins or throwing darts to get answers).

the tricky part about hypothesis testing is that we have to think somewhat backwards about it – we have to test what is known as the “null hypothesis”. as an example, the hypothesis might be “obama is more popular than romney” while the null hypothesis is “there is no difference in popularity between obama and romney”. we focus on the null hypothesis because it tells us exactly what the expected value of our tests should be (obama popularity = romney popularity) and we can collect data and see if it comes out that way (see next section on “significance”). if it does, then we “accept the null hypothesis” and reject our original hypothesis. if the null hypothesis is disproven, we look at the data to see if our original hypothesis holds (obama> romney).

the supreme head of the church of england was a title created in 1531 for king henry viii of england, who was responsible for the foundation of the english protestant church that broke away from the authority of the roman catholic church after pope paul iii excommunicated henry in 1533 over his divorce from catherine