I think it is the first one
The state that the United Nations labeled an aggressor and sent forces to fight in 1950 was North Korea.
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The Battle of Marathon (Ancient Greek: Μάχη τοῦ Μαραθῶνος, romanized: Machē tou Marathōnos) took place in 490 BC during the first Persian invasion of Greece. It was fought between the citizens of Athens, aided by Plataea, and a Persian force commanded by Datis and Artaphernes.
Answer:
The debate over slavery divided the United States into two sides. The north emerged as the center of antislavery activity during the abolitionist movement. The abolitionists objected to slavery for moral reasons. They believed that it was an unjust practice that stripped humans of their dignity.
Explanation:
Slavery was practiced in British America from the beginning of the colonial era, and was firmly established when the Declaration of Independence of the United States was signed. After this, there was a gradual expansion of abolitionism in the North, that stated that slavery was contrary to human dignity, while the rapid expansion of the cotton industry since the 1800s caused the South to cling tightly to slavery, and try to expand it into the new western territories of the country. Thus, slavery polarized the nation into slave states and free states through the Mason-Dixon line, which separated Maryland (slave) and Pennsylvania (free).
