This present study investigates the issues related to the violation of non-interference principle through the pretext of international intervention in the state of Iraq. The main objectives of such intervention in Iraq are not only to prevent Iraq from acquiring weapons of mass destruction or to fight against terrorism, but also enlisted hidden agenda of strategic and economic goals. This study revealed the violation by uncovering various legal and political situations in Iraq and relates them to the importance of non-interference principles designated by the United Nations. In doing so, this research has identified the actual use of legal force at international levels through declassified and classified documents used to support the Iraqi invasion. This research uncovered the United States' (US) interpretations for her Iraqi intervention and how the prosecution is done according to underlying interest and goals which accommodate with the Security Council Resolutions. The current situation in Iraq, however, is sign of serious violation of the United Nations principles. The scope of the study is limited between 2003 until 2011. The methodology used is historical analytical method. Various official documents, news articles and notes from official sources have been analyzed to trace the development in international relations pertinent to the Iraqi affairs. The analysis employs inductive and legal approach where laws and international agreements were used. The study conclude that the non-interference principle is still viable for small countries but proves to be an obstacle to ambitious major states. This study substantiates that the motives and reasons claimed by the United States to invade Iraq have no legal basis according to international laws but the real objectives were oil and strategic occupation in Iraq. The United States' aggression against Iraq is without justification. The non-issuance of a Security Council resolution condemning such aggression is a dangerous international precedent. It led to the unlawful occupation of Iraq, devastated the state, looted Iraqi natural resources, killed and displaced the population, which eventually caused Iraq instability and insecurity. In the end due to disease and epidemics outbreaks as well as environmental pollution, the state of Iraq is facing a serious collapse of its physical and social structure.