None of the targeted countries listed below posed any threat to the often cited 'international security'. Instead, foreign intervention pressured them into insecurity and chaos, usually leading to permanent war when the foreign powers fail to impose their will.
The UN Security Council is something of a permanent Berlin Conference, where the dominant world powers come together to negotiate their differences and divide the weak countries into spheres of interest. The UNSC has nothing to do with peace and security. It is a major instrument of propaganda, justifying aggressions and denying truth to come forward. But, apart from that, the organization is fielding up to 100000 mercenary troops from member states.
No other country was targeted by the UNSC with such intensity as Iraq. See the list of related UNSC Resolutions.
The DRC had been invaded by Rwanda and Uganda shortly following the takeover of power in Rwanda by the Rwanda Patriotic Army, which had in 1990 attacked Rwanda from Uganda. Helping Laurent Kabila to take power in the DRC, their formerly good relationship turned antagonistic when Kabila insisted on the sovereignty of the DRC. For many years Rwanda and Uganda, driven by their masters in the USA and Britain, plundered Congolese resources and Rwanda also tries to annex parts of the Congo.
The Sudan hadn't attacked any of their neighbors. Using Uganda as a base, the USA tried for years to devide the Sudan by fuelling war between forces in Southern Sudan and the Central Government of Sudan. After accepting the division plan, the Central Government lost support by the people, whom they had told for years that they must fight for the unity of the country. Fighting broke out in the western region of Darfur.
By no means, at a no time, did the Sudan pose any threat to the so called international security. Quite the opposite, Sudan was under attack from the USA and under constant demonizing propaganda by the self-declared 'international community'.
The Somalis were divided by the colonial powers in five countries. They were denied peaceful reunification. In 1977, it tried to liberate the Ogaden region, where the large majority is Somali, from Ethiopian rule. After the 'communist' revolution in Ethiopia, the Sowjet Union switched sides and the Somalis were driven out.
With the end of the Cold War, the long term President Siad Barre fled the country. Under cover of the UN, the USA invaded in 1992 and never let Somalia come to rest again. Facing serious resistance by Somalis, the USA removed their ground troops. Using neighboring countries (Uganda, Kenia, Ethiopia) to provide forces on the ground, the main interest of the USA is to force Somalia into permanent war.
It was no threat to 'international security'. Just the opposite, Somalia is a country forced to defend itself against foreign aggressors for decades now.
Afghanistan became a battleground of the USA and Sowjet Union in the 1980s. When the Russians left, the various armed forces in the countries continued to fight each others and criminality grew out of control. Only during the few years of Taliban rule, the fighting largely came to a halt.
After years of demoniying propaganda, the USA declared itself attacked by Afghanistan on September 11, 2001. To commonly defend their NATO member, a coalition of NATO countries send troops to invade and occupy the country. Remaining unsuccessful to marginalize the resistance and impose their schemes upon Afghanistan, NATO seems to finally get out after nearly 20 years.
Afghanistan is another of those permanently attacked countries needing to be finally left alone to find peace.
In 1990, Uganda invaded into Rwanda. The forces were largely second and third generation refugees from Rwanda long settled in Uganda. Being largely a confrontation between the USA and Britain on the Ugandan side, and France and Belgium on the Rwanden side, the war culminated into mass murder in 1994.