Complex sentence: As Oklahoma's statehood loomed the Apukshunnubbee District, and its constituent counties, slowly wound down their governmental functions as the United States Courts in the Indian Territory usurped their powers.
Split into simpler sentences: As Oklahoma's statehood loomed, the Apukshunnubbee District, and its constituent counties, slowly wound down their governmental functions. The United States courts in the Indian Territory usurped their powers.