The Missouri Compromise was an effort by Congress to defuse the sectional and political rivalries triggered by the request of Missouri late in 1819 for admission as a state in which slavery would be permitted. At the time, the United States contained twenty-two states, evenly divided between slave and free. i hope that helps you :)
The constitution established the government, set laws for the country, and guaranteed basic human rights to the citizens of the United States
It's the day of great significance in South Africa because of the two wars that they had: The battle of Blood River in 1838 between the voortrekkers and the Zulus.
Hope this helps!