Complex sentence: The offer was made to the Montenegrin officials, as the offensive was first officially endorsed by the Montenegrin government on October 1, while Serbia publicly distanced itself from the move three days later, blaming Croatia for provoking the JNA.
Split into simpler sentences: The offer was made to the Montenegrin officials because the offensive was first officially endorsed by the Montenegrin government on October 1. Three days later, Serbia publicly distanced itself from the move, blaming Croatia for provoking the JNA.