Uganda deployed troops to South Sudan in response to a formal request from the South Sudanese government aimed at stabilizing the capital, Juba, following militia unrest. While this intervention was officially framed as a measure to secure peace, its legality under international law has come under scrutiny amid reports of intensified armed conflict and civilian harm.
The intervention was initiated on the basis of consent from South Sudan’s internationally recognized government, a principle known as “intervention by invitation.” This practice allows a state to request military assistance from another without breaching the prohibition on the use of force laid out in Article 2(4) of the UN Charter. Despite this foundation for legality, Uganda’s ongoing military actions have drawn criticism from the United Nations Commission on Human Rights in South Sudan (UNCHRSS).
The UNCHRSS reported that Uganda’s joint operations with South Sudan’s military forces have escalated violence, particularly highlighting aerial bombardments impacting communities primarily belonging to the Nuer ethnic group. This conduct appears inconsistent with obligations under International Humanitarian Law (IHL) and International Human Rights Law (IHRL), which protect civilian populations during armed conflicts.
Compounding these legal concerns is the violation of a binding arms embargo established by United Nations Security Council Resolution 2428 (2018). The embargo prohibits the supply, sale, or transfer of arms and related materiel to parties involved in South Sudan’s conflict. Uganda’s continued military engagement and provision of support challenge the effectiveness and enforcement of this resolution.
This intervention also raises broader questions about the principle of self-determination in the context of civil conflict. While the government’s consent permits foreign military assistance, the involvement of external forces in internal strife may affect the people’s autonomous political will and potentially escalate ethnic tensions.
Intervention by invitation typically requires the explicit and legitimate consent of the host government. The doctrine is distinct from unauthorized uses of force, as it circumvents the territorial integrity clause of the UN Charter by acting at the behest of the sovereign state. However, such consent does not exempt intervening forces from adherence to international humanitarian standards or Security Council mandates.
As Uganda’s military presence continues, international observers emphasize the need for accountability regarding actions on the ground, urging respect for civilian protection and compliance with arms restrictions. The case underscores the complex balance between supporting fragile governments and avoiding the deepening of internal conflicts through external military involvement.