Complex sentence: The Battle of Chemulpo Bay was an early naval battle in the Russo-Japanese War (1904-1905), which took place on February 9,1904 off the coast of present day Inchon, Korea.
Split into simpler sentences: The Battle of Chemulpo Bay was an early battle in the Russo-Japanese War (1904-1905). It took place on February 9,1904 off the coast of present day Inchon, Korea.