Complex sentence: The clan grew in prominence after the downfall of Slobodan Milošević with an influx of many Red berets members, including Milorad Ulemek, people with military training, wartime experience and connections with elements of Serbian state secret service UDBA.
Split into simpler sentences: The clan grew in prominence after the downfall of Slobodan Milošević with an influx of many "Red Berets" paramilitaries, including Milorad Ulemek. These were people who had military training, wartime experience and connections with elements of the Serbian state secret service UDBA.