As of 2016, every major European former colonial power has suffered at least one defeat in an African State, but the question is likely referring to the ITALIAN defeat against the Ethiopians at the Battle of Adwa, which was the only major defeat of a European colonial power prior to World War II by an African country.
The defeat of the south vietnamese forces was happened in the 30th of April , 1975 .
He was faced with either using nukes or invading the north. Either of which risked WWIII. So rather than face defeat (he didn't want to be the first US President to lose a war) he refused to remain commander in chief when his term expired.
To defeat the South Vietnamese government.
Communists
From the communists: Victory From the US/Allies: Defeat
I believe it was because, the French were defeated by the Viet Minh rebels, which marked the end of French involvement in Vietnam. The Vietminh defeated the French and ended colonial rule.
The Tet offensive did occur in 1968.In January of 1968, the North Vietnamese and Viet Cong attack various cities in South Vietnam. American and South Vietnamese troops repelled the attack, but they also suffered heavy losses. This conflict lasted for a few months during 1968.
Camden.
The French .
During the American Revolutionary War, the 1777 defeat of the British at Saratoga (through a succession of battles) was important for two reasons. First, it secured the northern border of the colonies against British excursions. Second, it convinced European powers, particularly France, to show formal (and significant) support for the Americans. European support led directly to American victory in the war as a whole.
He blamed them for Germany's economic problems and its defeat in WWI.