Complex sentence: In January 1898 he ordered the USS "Maine" to Havana, Cuba, as a matter of "customary relations", although he and McKinley were concerned for the safety of Americans in Cuba due to the ongoing Cuban War of Independence.
Split into simpler sentences: In January 1898 he ordered the USS "Maine" to Havana, Cuba, as a matter of "customary relations". He and McKinley were concerned for the safety of Americans in Cuba due to the ongoing Cuban War of Independence.