In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

After the Kuomintang ( KMT ) , the governing party of China , unified the country in the 1920s , the civil war between it and its past ally Communist Party of China began .
The Kuomintang ( KMT ) party in China launched a unification campaign against regional warlords and nominally unified China in the mid-1920s , but was soon embroiled in a civil war against its former Chinese Communist Party allies and new regional warlords .