Should Lebanon file a complaint against Iran?

Source: Nida Al Watan – Jocelyne al-Boustany

In May 1958, Lebanon submitted an official complaint to the United Nations Security Council (UNSC) against the United Arab Republic (UAR), and the accusation was clear: continuous interference in its internal affairs through the infiltration of armed groups, the provision of weapons, and the support of cross-border rebellion. These actions were considered serious enough to threaten international peace and security. Lebanon was not facing a conventional invasion, but rather what could be described as a form of “indirect aggression.”

Lebanon’s complaint against the UAR was based on an idea that was then still taking shape: that arms smuggling, infiltration, and the recruitment of irregular fighters could constitute indirect aggression. This was an advanced argument for its time, one that later contributed to the codification of these principles in United Nations General Assembly (UNGA) Resolution 3314. This approach became a crucial diplomatic tool for addressing “indirect” threats, such as sabotage and externally supported insurgencies, and it remains one of the most significant developments in international law: the recognition that states can wage war without declaring it, by employing non-state actors.

Nearly 7 decades later, the similarities appear striking.

Once again, Lebanon is facing a form of aggression that does not manifest as a formal war between states. Hezbollah, as an armed group operating within Lebanese territory, possesses military capabilities that cannot be separated from ongoing external support. For a long time, it has received weapons, training, and strategic guidance from Iran, contributing to the strengthening of its capabilities and its role within a broader regional framework.

This was publicly confirmed by Mojtaba Khamenei, who described Hezbollah’s role as “devoted” and thanked it for providing support to the Islamic Republic of Iran during the war with Israel and the United States (US), in his first statement issued on 12 March 2026, via a written message.

Thus, the pattern is familiar: an external power exercising its influence and capabilities through an intermediary embedded within the state. At its core, this is the same structure that Lebanon denounced in 1958.

As was the case then, Lebanon today could submit a similar complaint, this time against Iran, arguing that its sovereignty is being violated, not through a declared war, but through ongoing interference from Tehran via armed actors operating on its territory. However, the present reality goes beyond mere similarity.

Unlike in 1958, current information includes reports indicating the involvement of officers from the Iranian Revolutionary Guard Corps (IRGC) operating inside Lebanon. This is a fundamental difference: the Revolutionary Guard is not a proxy, but an official organ of the Iranian state. Its presence adds an element that was not present in the 1958 complaint: it is not limited to indirect involvement, but also points to a physical presence of a foreign state apparatus within the same operational environment.

The core of such a complaint should therefore be grounded in Iran’s continuous provision of weapons, funding, and training to Hezbollah, alongside the operational presence of the Iranian Revolutionary Guard Corps on Lebanese territory. This can be framed not merely as political alignment or ideological support, but as a sustained pattern of interference. When such involvement reaches a certain threshold, it begins to approach what international law defines as an “indirect use of force.” To establish responsibility, Lebanon would need to demonstrate that the relationship is not merely one of sponsorship, but involves a degree of influence and control over conduct.

Accordingly, the analogy to 1958 is not merely rhetorical, but legal and doctrinal. It reveals both continuity and escalation: what was indirect in the past has become more explicit and pronounced today.

Thus, the precedent exists, and the mechanism is available. Rather than relying solely on the historical concept of “indirect aggression,” it should be constructed as a multi-layered legal argument. Lebanon could argue that Iran’s actions constitute: a violation of sovereignty, a breach of the principle of non-intervention, and a form of indirect use of force as outlined in Resolution 3314.

Such a course of action would help reshape the narrative and reposition Lebanon; not as a permanent arena for regional conflict, but as a state defending its legal rights in the face of external encroachment. It would also compel an international discussion on the normalization of proxy warfare and highlight the persistence of this threat.

In 2026, the challenge is no longer limited to proving the existence of “indirect aggression,” but rather lies in pushing the international system to confront its implications.

In this case, history does not offer a scenario; it offers a standard.