Judgment on a case lodged by the Philippines challenging China's claims in the South China Sea will be handed down by the Permanent Court of Arbitration (PCA) on July 12.
The PCA, an intergovernmental organisation that organises arbitral tribunals to resolve disputes among its 121 member states, is based in The Hague, and the upcoming ruling is often referred to as The Hague ruling.
Here's a timeline of the dispute so far:
In a submission to the United Nations, China claims sovereignty to islands in the South China Sea on the basis of a map with a "nine dash line" which marks out its claimed territorial waters. These extend hundreds of miles to the south and east of its island province of Hainan. Vietnam and Malaysia object.
Philippine naval forces intercept eight Chinese fishing boats near an atoll known as Scarborough Shoal, 220km off the coast of the Philippines.
Scarborough Shoal is claimed by China, the Philippines and Taiwan.
The Philippines, which says the Shoal is in its exclusive economic zone (EEZ), find a large haul of illegally-fished turtles, baby sharks, clams and corals on board the Chinese vessels. They try to arrest the fishermen but are stopped by the arrival of two Chinese maritime ships.
This leads to a two-month standoff.
Philippine forces leave as part of US-mediated deal to negotiate, but Chinese forces remain and gain control.
The Philippines files a case with the Permanent Court of Arbitration (PCA) in The Hague.
It seeks a ruling that
China submits a Note Verbale rejecting the Philippines' claims and calling for the dispute to be resolved through bilateral negotiations. China states the Arbitral Tribunal lacks jurisdiction in the case.
China says it does not accept the arbitration initiated by the Philippines and will not participate in the proceedings.
The Philippines submits a 10-volume Memorial to the Arbitral Tribunal that contains its legal analysis and evidence for the case.
Satellite imagery shows China has been reclaiming land at five sites in the Spratlys and building airstrips.
China says it has "almost completed" reclamation in the South China Sea. According to the US, China has reclaimed some 3,000 acres of land since start of 2014.
The US sends warship USS Lassen within 12 nautical miles of one of China's man-made islands - Fiery Cross Reef in the Spratlys. China objects, tracking and warning the vessel.
The PCA rules that it has power to hear the Philippines' case and rejects China's argument that the dispute is about sovereignty over islands and therefore beyond the tribunal's jurisdiction.
The US conducts another FON operation, this time near Triton Island in the Paracels. China objects.
The long-range, surface-to-air missiles and fighter jets are deployed on Woody Island in the Paracels as US President Barack Obama meets Asean leaders and calls for a halt to construction or militarisation in Asia's seas.
The US deploys two aircraft carrier strike groups for an exercise in the Philippine Sea, near the South China Sea. Analysts say the move is to reassure America's allies in the Asia Pacific.
China holds drills in waters around the disputed Paracel Islands, with other ships prohibited from entering the waters during that time.
The Arbitral Tribunal's ruling is expected at 5pm Singapore time.