These two events overlapped, splitting UN attention
The Suez Canal Crisis and the Hungarian Uprising
The year in which Congo became independent
1960
Dividing line between North and South Korea over which the war was fought
38th Parallel
A sudden and often violent overthrow of a government by a small group; often by military, paramilitary, or political elites
Coup
Common UN motivation for involvement
Maintain sovereignty of states, maintain order, peacefully resolve disputes, etc.
(Other answers may be acceptable)
The year in which the Katanga secession was defeated
1963
Area from which the Chinese forces pushed the UN forces back
The Yalu River
"An attack on one is an attack on all," as an ideology
Collective Security
An unsuccessful uprising against Soviet control in this country in 1956 exposed limits in the UN's authority
Hungary
Daily Double: Resource-rich region which seceded following independence
Katanga
What the war devolved into and the result
Stalemate and Armistice; ceasefire but no formal end to war
Point to which UN forces were pushed back during the Korean War
Pusan Perimeter
The Soviets claimed this about UN involvement in the Congo conflict
That it backed Western interests
Peacekeeping force deployed during the conflict
ONUC/United Nations Operation in the Congo
(Yeah the acronym makes no sense)
The names of North and South Korea during the war
South = Republic of Korea
North = Democratic People's Republic of Korea
The first UN peacekeeping force
UNEF/United Nations Emergency Force
These three countries made a plan to attack Egypt, prompting UN intervention
UK, France, and Israel
Staged a coup, and became dictator following reunification
Mobutu Sese Seko
Daily Double: Counterattack by UN forces to push back after being cornered; marked a major turning point in the war
Inchon Landing
Belief that all 'peace-loving states' can be a member of the United Nations
The Association Principle