On 30 June 1960, the Belgian Congo declared its independence, Joseph Kasavubu was elected President and Patrice Lumumba became Prime Minister, naming the Republic of the Congo for short.
In the barracks in the capital Leopoldwil, a Belgian officer clashed with black soldiers, causing a mutiny, Belgium on the pretext of Lumumba's inability to protect the Belgians, quickly sent troops to occupy strategic places such as the airport, Lumumba immediately announced the severance of diplomatic relations with Belgium, regarding belgium's troops as an armed invasion. So Belgium supported the warlord Chomber in the Katanga region, and in July Chongbo declared the establishment of the Republic of Katanga, independence from the Democratic Republic of the Congo, and then in August, South Kasai between the central government-controlled area and Katanga also took the opportunity to declare its independence from the Democratic Republic of the Congo.

In September 1960, Lumumba's chief of staff, Mobutu, with the support of the United States, staged a military coup d'état to take over The Lumumba regime as commander-in-chief of the Nationalist Army. On 27 November, Lumumba was arrested while leaving the capital for a base centered on Stanleyville, and on 17 January 1961, Lumumba was shot dead by the warlord Chong Bo of katanga.
On 18 September 1961, while then-Secretary-General of the United Nations, Dag Hammarskjöld, was on a trip to the Congo to mediate a ceasefire, the plane he and his entourage were travelling on crashed near Entora, then British Northern Rhodesia (present-day Zambia). Hammarskjöld was killed at the same time as 15 entourage and crew.
In 1965, Mobutu staged another coup d'état to overthrow Joseph Casavub, making himself president, marshal, and beginning his 32-year reign.
Movie Postscript: Not a single Irish soldier died during the five days of trapping in Jadoville. Upon returning home, the soldiers were seen as cowards, and the whole incident was covered up, and they were called "cowards of Yadoville". Dr Conner O'Brien resigned from the United Nations and became a senior minister in the Irish government. The commander of the Foreign Mercenaries, Renefarque, continued to lead military coups in Africa and the Middle East, and he was one of France's most respected members of the Foreign Legion. The independence turmoil in Katanga province ended in 1963, and when the United Nations defeated the Katanga rebels, Chong Bo absconded abroad, and although he was not personally tried, he was still convicted of treason. In 1969, he died of a heart attack while under house arrest in Algeria.
In 2005, the soldiers of Squadron A were finally hailed as heroes by the Irish government.
The Democratic Republic of the Congo is a country with very rich mineral resources and rubber resources, and in the face of this huge cake, the Western powers are looking at each other with their fists in hand, and for their own interests, they can't care about how to eat.