Apparently, FDR wanted decolonization and Truman originally supported, but Soviet domination in Europe caused US foreign policy to change from promoting decolonization to promoting tinpot dictators and minority rule states. Assuming there's a West Germany, that also assumes that DeGaulle's rule returns to the mainland, and this would completely butterfly away the so called Colonial War that pitted the US against the SU for decades, but never in direct conflict. There would be no ironically named Free France years, where DeGaulle ruled Africa with an iron fist, because a united France would no doubt begin decolonization. Free France was the model of minority rule that was used in Indochina when the minority declared independence, and that lasted up until the end of the Indochinese Jungle War in the late 70s. We even still have other minority rule states in Africa, carved out of the former British lands when the mainland fell into the Soviet Sphere, like Kenya, Rhodesia-Nyasa and South Africa, which are almost entirely propped up by the USA. Don't even get me started on the African Royalty phenomena, where the US supported a new wave of Napoleonesque dictators and self-proclaimed emperors, creating the modern day Kingdom of Zaire and the Central African Empire among others.
Without the Colonial War, there would no doubt be a third world war. With a Europe split between east and west, conflict would be inevitable. Nukes would fly within 20 years, if not sooner. Despite the horrors of minority rule and US backed dictators, the conflicts being limited to proxy wars no doubt prevented total nuclear annihilation.