The International Court of Justice ruled that Chile was under no obligation to restore Bolivia's access to the Pacific Ocean, which it had lost in the 19th century.

The International Court of Justice, or colloquially the World Court, is the principal judicial organ of the United Nations (UN). It settles legal disputes submitted to it by states and provides advisory opinions on legal questions referred to it by other UN organs and specialized agencies. The ICJ is the only international court that adjudicates general disputes between countries, with its rulings and opinions serving as primary sources of international law. It is one of the six principal organs of the United Nations.

Obligation to Negotiate Access to the Pacific Ocean was a case at the International Court of Justice. In the case, Bolivia petitioned the Court for a writ of mandamus obligating Chile to negotiate with Bolivia to restore Bolivia's access to the Pacific Ocean, which it had lost to Chile in 1879 during the War of the Pacific. In 2018, the court rejected Bolivia's arguments, finding that Chile was under no such obligation.