

Aterritorial dispute orboundary dispute is a disagreement over thepossession or control ofterritories (land,water orairspace) between two or morepolitical entities.
Territorial disputes are often related to the possession ofnatural resources such asrivers, fertile farmland,mineral orpetroleum resources although the disputes can also be driven byculture,religion, andethnic nationalism. Territorial disputes often result from vague and unclear language in a treaty that set up the original boundary.
Territorial disputes are a major cause ofwars andterrorism, as states often try to assert theirsovereignty over a territory through invasion, and non-state entities try to influence the actions of politicians through terrorism. International law does not support theuse of force by one state to annex the territory of another state. TheUN Charter states, "All Members shall refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state, or in any other manner inconsistent with the Purposes of the United Nations."
In some cases in which the boundary is not demarcated, such as theTaiwan Strait, andKashmir, the parties involved define aLine of Control, which serves as thede facto international border.

Territorial disputes have significant meaning in the international society, both by their relation to the fundamental right of states, sovereignty and also because they are important for international peace. International law has significant relations with territorial disputes because territorial disputes tackles the basis of international law; the state territory. International law is based on the persons of international law, which requires a defined territory, as mentioned in the 1933Montevideo Convention on the Rights and Duties of States.
Article 1 of the Montevideo Convention declares that "[t]he state as a person of international law should possess the following qualifications: (a) a permanent population; (b) a defined territory; (c) government; and (d) capacity to enter into relations with other States"[1]
Also, B. T. Sumner's article mentions, "In international law and relations, ownership of territory is significant because sovereignty over land defines what constitutes a state."[2]
Therefore, the breach of a country's borders or territorial disputes pose a threat to a state's very sovereignty and the right as a person of international law. In addition, territorial disputes are sometimes brought to theInternational Court of Justice, as was the case in Costa Rica and Nicaragua (2005).[3] Territorial disputes cannot be separated from international law, whose basis is on the law of state borders, and their potential settlement also relies on international law and the Court.