Complex sentence: Dennis had received threats from his enemies and almost every competitor in the business wanted him dead; therefore, he moved around with no less than 20 heavily armed bodyguards that carried bags packed with submachine guns and grenades and communicated with each other with walkie-talkies.
Split into simpler sentences: Dennis had received threats from his enemies and almost every competitor in the business wanted him dead. Therefore, he moved around with no less than 20 heavily armed bodyguards who carried bags packed with submachine guns and grenades and communicated with each other with walkie-talkies.