Complex sentence: The film claimed that the two men detested each other and were barely on speaking terms after the Australia tour; the rift was caused in part by Brambell's alcoholism, and led to the two men leaving the country on separate aircraft.
Split into simpler sentences: The film claimed that the two men detested each other and were barely on speaking terms after the Australia tour. The rift was apparently caused in part by Brambell's alcoholism, and led to the two men leaving the country on separate aircraft.