Complex sentence: On 6 December main german troops led by Lettow-Vorbeck advanced on Kibata, british forces were driven out from they outposts to two redoubts on Picquet hill, north from Kibata.
Split into simpler sentences: On 6 December, main German troops led by Lettow-Vorbeck advanced on Kibata. British forces were driven out from they outposts to two redoubts on Picquet hill, north from Kibata.