Complex sentence: He vindicated himself in action by sinking the "Rurick" and damaging the "Gromoboi" and "Russiya" on 14 August 1904 at the Battle off Ulsan, and regained his popularity both within the government and the Japanese public.
Split into simpler sentences: He vindicated himself in action by sinking the "Rurick" and damaging the "Gromoboi" and "Russiya" on 14 August 1904 at the Battle off Ulsan. Kamimura regained his popularity both within the government and the Japanese public.