As a result of the Holocaust during World War II, the United Nations designated a Jewish homeland that became what country?

The answer is Palestine.

Explanation:

Through the Balfour Declaration of 1917, the United Kingdom approved that Palestine would be considered a "national home for the Jewish people." This Commitment was confirmed by the British government during the British Mandate for Palestine.

The idea of the existence of a homeland for the Jewish people has had its origin in aspects related to culture and religion in Jewish people. The Napoleonic Wars that took place during the early 19th century resulted in an idea that was called Jewish emancipation. This event produced the establishment of some religious, cultural as well as political philosophies concerning the Jews in Europe.

The Jewish homeland became Palestine