Complex sentence: Kealoha is one of the few Hawaiian soldiers of the Civil War whose real name is known; many combatants served under anglicized pseudonyms because they were easier for English-speaking Americans to pronounce than Hawaiian language names.
Split into simpler sentences: Kealoha is one of the few Hawaiian soldiers of the Civil War whose real name is known. Many combatants served under anglicized pseudonyms because they were easier for English-speaking Americans to pronounce than Hawaiian language names.