Complex sentence: The Ogonis threatened mass action to disrupt operations if the companies failed to comply, shifting the focus of their actions from an unresponsive federal government to the oil companies engaged in the region.
Split into simpler sentences: The Ogonis threatened to embark on mass action to disrupt their operation if the companies failed to comply. By this act, the Ogoni shifted the focus of their actions from an unresponsive federal government to the oil companies engaged in the region.