International law cases

Rarely.
Individual nations have the guns, and international forces only have the guns loaned to them.
So unless the international law has the backing of other nations/nation, the national law wins.
And of course in most of the other cases, it is really only a different set of national laws that win.

What Court Hears International Law Cases.
UN authorities refer to the International Court of Justice (ICJ) as the country’s foremost court of justice.
Under international law, this UN-established panel represents the interests of all member states as it settles legal disputes.
Table of contents .

Since the Reports began in 1929, under the title of the Annual Digest of Public International Law, over 10,000 cases have been reported in full or digest form

The ILR Editors are Sir Christopher Greenwood GBE CMG KC and Ms Karen Lee, Fellow of the Centre, Fellow and former Vice-Mistress of Girton College, Cambridge

International jurisprudence is also reflected in decisions from the African Court on Human and Peoples’ Rights (Goa alias Vedastus v

Tanzania), the Court of Justice of the European Union (Slovenia v

EU Council), the European Court of Human Rights (Democratic Republic of the Congo v

The list of International Court of Justice cases includes contentious cases and advisory opinions brought to the International Court of Justice since its creation in 1946

Forming a key part of international law, 177 cases have been entered onto the General List for consideration before the court