Police Department. The Soviet oil tanker Antonio Gramsci suffers a minor shipwreck in shallow waters shortly after leaving shore in Ventspils, resulting in a 5,000 ton oil spill, the largest that has ever occurred on the Baltic Sea. March March 1 Scottish devolution referendum: Scotland votes in favour of a Scottish Assembly, which is not implemented due to failing a condition that at least 40% of the electorate must support the proposal; in a Welsh devolution referendum, Wales votes against devolution. Philips publicly demonstrate a prototype of an optical digital audio disc at a press conference in Eindhoven, Netherlands. March 2 – Uganda–Tanzania War: Battle of Tororo: Ugandan rebels attack and capture the town of Tororo. March 4 The U.S. Voyager 1 spaceprobe photos reveal Jupiter's rings. Uganda–Tanzania War: Battle of Tororo: The Ugandan military retakes Tororo from rebels. March 5 – Voyager 1 makes its closest approach to Jupiter at . March 7 – The largest Magnetar (Soft gamma repeater) event is recorded. March 8 Philips demonstrates the compact disc publicly for the first time. Thousands of women participate in the International Women's Day Protests in Tehran, 1979 against the introduction of mandatory veiling during the Iranian revolution. Images taken by Voyager I proved the existence of volcanoes on Io, a moon of Jupiter. March 10 – Uganda–Tanzania War: Battle of Lukaya: The Ugandan military, a Libyan expeditionary force and allied Palestine Liberation Organisation militants begin a counter-offensive against Tanzanian troops in south-central Uganda. The Ugandan-led alliance retakes Lukaya after a short clash with the Tanzanian military. March 11 – Uganda–Tanzania War: Battle of Lukaya: The Tanzanian military counter-attacks at Lukaya, completely defeating the Ugandan-led alliance. This defeat permanently cripples the Ugandan military. March 13 – Maurice Bishop leads a successful coup in Grenada. His government will be crushed by American intervention in 1983. March 14 – In China, a Hawker Siddeley Trident crashes into a factory near Beijing, killing 31 people on the ground and injuring 200. March 16 End of major hostilities in the Sino-Vietnamese War. In his letter to the United Nations, Elisio De Figueiredo, the People's Republic of Angola's Permanent Representative to the United Nations, requests an urgent meeting of the United Nations Security Council on the question of South Africa's continuous acts of aggression in Angola. March 17 – The Penmanshiel Tunnel in the UK collapses, killing two workers. March 19 - C-SPAN, an