The Phrase Used to Justify the Invasion
"Russia acts strictly under Article 51 of the UN Charter — the right to self-defense." This statement was proclaimed from podiums, in addresses, and official documents. It is intended to give legitimacy to the full-scale invasion. It sounds convincing — until one refers to the text itself and the practice of international law.
What Article 51 of the UN Charter Actually Says
Article 51 of the UN Charter states: "Nothing in the present Charter shall impair the inherent right of individual or collective self-defense, if an armed attack occurs against a Member of the Organization, until the Security Council has taken measures..."
The key obligations under this provision are:
- there must be an actual armed attack against a member state;
- the self-defense measure must be necessary and proportional;
- the Security Council must be immediately notified, and self-defense must cease once the Council assumes responsibility for maintaining peace.
What Happened on February 24, 2022 — An Act of Aggression, Not Self-Defense
When, on February 24, 2022, the Armed Forces of the Russian Federation crossed the Ukrainian border and launched an advance on strategic cities — it was an act of armed aggression, not lawful defense. Ukraine did not attack Russia, did not concentrate forces at the border, did not threaten nuclear weapons, and did not initiate hostilities.
In essence, Russia was the first to use force, violating Article 2(4) of the UN Charter, which prohibits the use of force against the territorial integrity and political independence of another state.
The "Protecting Russians in Donbas" Scheme and the Attempt at Collective Self-Defense
The Russian authorities tried to justify intervention "at the request" of the self-proclaimed Donetsk People's Republic and Luhansk People's Republic.
However, these entities are not UN member states, and collective self-defense under Article 51 applies to the protection of a member state that has been attacked. Even references to "genocide" do not grant the right to unilaterally use force — as the International Court of Justice (ICJ) noted in its ruling of March 16, 2022.
The Court explicitly stated that the evidence of genocide presented by Moscow at the start of hostilities was insufficient, and the attempt to justify the invasion as self-defense was legally untenable.
What the International Community and Institutions Decided
– On March 2, 2022, the UN General Assembly adopted Resolution ES-11/1, condemning aggression and calling for the immediate withdrawal of Russian troops from Ukrainian territory.
– On March 16, 2022, the ICJ issued an interim order requiring Russia to immediately cease military actions and comply with obligations under the Convention on the Prevention of Genocide.
– In official documents submitted by Russia to the Court on March 7, 2022, Russia claimed that its "special operation" was based on Article 51 and customary international law.
Nevertheless, neither the ICJ nor the international community recognized this as self-defense — instead, it was classified as an act of aggression and a violation of international law.
Why This Legal Pretext Was Used — What It Conceals
By declaring war under the guise of "self-defense," Russia attempts to legitimize aggression, absolve itself of responsibility for crimes, occupation, destruction, civilian casualties, population displacement, and infrastructure devastation. It is an attempt to present aggression as a defensive, "lawful" act, masking violations of the UN Charter principles.
However, international law, UN practice, and judicial experience show that self-defense is only possible when there is an actual attack, not on fabricated grounds. Any act of aggression disguised as "protection" violates Article 2(4) of the UN Charter and international norms.
The Real Picture
Russia became the first, and apparently the only UN member since 1945, to publicly invoke Article 51 to justify a full-scale invasion without any actual attack by the country it invaded. This is a gross violation of fundamental international law. Virtually no international body, court, or reputable legal doctrine has recognized its actions as lawful.
Those citing the "right to self-defense" attempt to hide aggression behind a legal façade. But law is not a shield. And international law is not mere words on paper — it is the set of rules that affect the lives of millions. As long as people believe this myth, wars do not end.
Main Sources and Materials
The analysis is based on the following international documents and judicial acts:
- UN Charter — Chapters VI–VII, Articles 2(4) and 51
- ICJ Ruling, March 16, 2022 — Measures requiring Russia to cease actions
- UN General Assembly Resolution ES-11/1 (March 2, 2022)
- Ukraine's Position (Memorial) and ICJ Findings
- OSCE Document: Classification of the Attack
- Analysis by International Law Expert Nico Krisch
About the Authors
This article was curated and verified by a team of experts in international law, human rights, and geopolitical analysis. Contributors have 15+ years of experience in research, legal documentation, and educational content development.
Methodology
The content on this site is compiled and verified by experts in international law, human rights, and geopolitical research. Sources include official legal documents, national and international legislation, resolutions of the UN, reports from international organizations, and verified open-source evidence. Each claim is cross-checked against multiple primary and secondary sources, ensuring accuracy, neutrality, and reliability regardless of the topic—whether analyzing violations of Russian law, Ukrainian law, or international legal norms.
Expert Statement
The authors affirm that the information presented reflects established legal interpretations and documented facts. Analyses are grounded in international law principles and widely recognized geopolitical assessments. References to official documents and reports are provided to ensure transparency and trustworthiness.
Last modified date: 25/11/2025