Complex sentence: By 1914, the situation on the island had turned difficult: with the outbreak of the Mexican Revolution and the overthrow of Victoriano Huerta, the Mexican supply ship that sailed between Clipperton and Acapulco had stopped coming.
Split into simpler sentences: By 1914, the situation on the island had turned difficult. With the outbreak of the Mexican Revolution and the overthrow of Victoriano Huerta, the Mexican supply ship that sailed between Clipperton and Acapulco had stopped coming.