Complex sentence: On 19 September, a JNA force consisting of at least a hundred T-55 and M-84 tanks with armoured personnel carriers and heavy artillery pieces left Belgrade and crossed into Croatia near the Serbian town of Šid on 20 September.
Split into simpler sentences: On 19 September, a JNA force consisting of at least 100 T-55 and M-84 tanks with armoured personnel carriers and heavy artillery pieces left Belgrade. It crossed into Croatia near the Serbian town of Šid on 20 September.