https://en.prolewiki.org/wiki/Hollywood
The U.S. Department of Defense has access to the scripts of thousands of Hollywood films and modifies them to make them more favorable to U.S. militarism.[5] The government and military have complete editorial control over many of these films.[3] The government often censors movies that suggest U.S. military incompetence, war crimes, or involvement in torture or coups. Many movies that are critical of U.S. imperialism are never released at all.[5] Pro-imperialist films are allowed to use authentic military equipment and vehicles that the producers would not be able to afford otherwise.[1] Popular U.S. movies that have been influenced by the Pentagon or CIA include Apollo 13, James Bond, Jurassic Park, Godzilla, Transformers, and the Marvel movies. Pentagon contracts usually specify that the government's role in the film must not be disclosed.[5]
Kwame Nkrumah writing about this issue in 1965:
Even the cinema stories of fabulous Hollywood are loaded. One has only to listen to the cheers of an African audience as Hollywood’s heroes slaughter red Indians or Asiatics to understand the effectiveness of this weapon. For, in the developing continents, where the colonialist heritage has left a vast majority still illiterate, even the smallest child gets the message contained in the blood and thunder stories emanating from California. And along with murder and the Wild West goes an incessant barrage of anti-socialist propaganda, in which the trade union man, the revolutionary, or the man of dark skin is generally cast as the villain, while the policeman, the gum-shoe, the Federal agent — in a word, the CIA — type spy is ever the hero. Here, truly, is the ideological under-belly of those political murders which so often use local people as their instruments.
Sorry that I don't have much to add personally aside from these quotes.
Very good summary of the origin's of Korea's division and the Korean war.
Some extra information to add on:
A 1946 opinion poll appearing in Korea's Dong-A Ilbo newspaper showed a majority of respondents favoring socialism as their preferred system, and less than 15% supporting capitalism. Together, socialism and communism received 77% support from survey respondents. (Source)
In 1950, when the Korean People's Army had taken control of Seoul, the CIA wrote that "over 50% of Seoul's students are actively aiding the Communist invaders, with many voluntarily enlisting in the Northern Army" and that among Seoul's population, "the working class generally supports the Northern Koreans" adding that the streets of Seoul were "crowded [...] especially with youths engaging in Communist demonstrations." (Source)
Meanwhile, here is the person backed by the US to run the southern regime:
A 1948 CIA report wrote regarding Rhee that "there is every prospect that Rhee's accession to power will be followed by intra-party cleavages and by the ruthless suppression of all non-Rhee Rightist, Moderate, and Leftist opposition," characterizing Rhee as an "imported expatriate politician" and "extreme rightist" and demagogue "bent on autocratic rule", who would be an "unpopular" figure who would play into communist propaganda due to his extreme rightist orientation, and stating that the U.S. throwing their full support behind him could potentially be "a source of future embarrassment to US policy in the Far East." (Source)