Complex sentence: On 29 October 1918, Syrmia became a part of the newly independent State of Slovenes, Croats and Serbs, while on 24 November, the Assembly of Syrmia proclaimed the unification of Serb-populated parts of Syrmia with the Kingdom of Serbia.
Split into simpler sentences: On 29 October 1918, Syrmia became a part of the newly independent State of Slovenes, Croats and Serbs. On 24 November 1918, the Assembly of Syrmia proclaimed the unification of Serb-populated parts of Syrmia with the Kingdom of Serbia.