Complex sentence: The famous Xhosa chief, Sandile, lost his life during the course of the war and after the war ended, the Transkei (the territory of the Gcaleka tribe who were led by Kreli) was annexed by the British.
Split into simpler sentences: The famous Xhosa chief, Sandile, lost his life during the course of the war. After the war ended, the Transkei or the territory of the Gcaleka tribe who were led by Kreli, was annexed by the British.