Complex sentence: The National United Front of Democracy Against Dictatorship ("Red Shirts") opposed to the military's influence in the formation of the Abhisit government and launched several rounds of protests and calls for general elections.
Split into simpler sentences: The National United Front of Democracy Against Dictatorship ("Red Shirts") was a pressure group that opposed the Thai military's alleged influence in the formating Abhisit's government. It promptly organised several rounds of protests and calls for general elections.