The International Court of Justice (ICJ) at The Hague is expected to hand down a verdict in the long-running case between the Democratic Republic of Congo and Uganda.
Both countries are demanding reparations from each other in relation to conflicts in the DR Congo’s mineral-rich Ituri province from 1998 to 2003.
The court in 2005 ruled that Uganda must pay compensation to DR Congo for its occupation and looting in Ituri.
It also found DR Congo culpable for an attack on Uganda’s embassy in the capital, Kinshasa, and ordered it to pay compensation.
The court ordered the neighbours to negotiate mutual reparations – but they were unable to reach an agreement, with Kinshasa pushing the case back to the court in 2015.
DR Congo is claiming more than $11bn (£8bn) in compensation for Uganda’s occupation, which Kampala has rejected as “disproportionate”.
The court is set to give a verdict at 14:00 GMT.