Complex sentence: The Bosnian Serb Army deployed troops and artillery in the surrounding hills, and beginning on May 2,1992, they imposed a blockade on all traffic in and out the city, starting what was to be known as the siege of Sarajevo.
Split into simpler sentences: The Bosnian Serb Army deployed troops and artillery in the surrounding hills. Beginning on May 2,1992, they imposed a blockade on all traffic in and out the city, starting what was to be known as the siege of Sarajevo.