Which event launched the Russo-Japanese War?

Question

the attack on Russian warships at Port Arthur
resistance to Japanese rule in Taiwan
Japan gaining Korea after the Sino-Japanese War
Russia’s loss of part of the island of Sakhalin

Answer 1

The event that launched the Russo-Japanese War was the attack on Russian warships at Port Arthur. This surprise attack occurred on February 8, 1904, and marked the beginning of hostilities between the two nations, primarily over imperial ambitions in Manchuria and Korea.