Short answers, pulled from the story.
The Battle of the Java Sea was fought on the 27th of February 1942. Related actions followed over the next days, including the Battle of Sunda Strait on the 28th of February and the 1st of March and the Second Battle of the Java Sea on the 1st of March.
Rear-Admiral Karel Doorman of the Royal Netherlands Navy commanded the Allied Combined Striking Force. He died when his flagship, the light cruiser HNLMS De Ruyter, sank after being torpedoed by the Japanese cruiser Haguro.
The Allied fleet combined ships from four navies with no shared doctrine, and a language barrier separated the Dutch-speaking Admiral Doorman from his English-speaking captains. Only Exeter carried radar, while the Japanese cruisers Haguro and Nachi had more powerful guns and more effective torpedoes.
The main battle sank the Dutch destroyer HNLMS Kortenaer, HMS Electra, HMS Jupiter, and the light cruisers HNLMS Java and HNLMS De Ruyter. Related actions afterward also sank USS Houston, HMAS Perth, HNLMS Evertsen, HMS Exeter, HMS Encounter, and USS Pope.
Japanese forces landed on Java on the 28th of February 1942, and ABDA forces surrendered on the 9th of March. The Dutch scuttled around 50 of their own ships at Surabaya, and the Netherlands lost control of the Dutch East Indies.
A wreck-diving team aboard the MV Empress located HNLMS Java and HNLMS De Ruyter in December 2002. The team later found HMS Electra in August 2003, HNLMS Kortenaer in August 2004, HMS Exeter and HMS Encounter in February 2007, and USS Pope in late 2008, though by 2017 illegal salvage had reduced all eight wrecks to remnants.