The United States has seized Iranian oil valued at Rp10 trillion (approximately $650 million USD). This action was carried out by the US military, invoking an ancient maritime law known as Prize Law, originating from the Medieval era. Prize Law permits the confiscation of enemy property during wartime or conflict. The seizure involves a fleet of oil tankers. The legality and implications of utilizing this historical legal framework in modern international relations are now being widely debated. This case highlights the contentious relationship between the US and Iran and raises questions about the application of historical laws in contemporary geopolitical contexts. The seized oil’s future remains uncertain amid legal challenges and diplomatic tensions.