Complex sentence: Since 2000 the Zimbabwean government has taken most of the farmland previously used by commercial farmers (mostly white) and reallocated it in a corrupt way to politicians from the reigning party ZANU-PF, military leaders or leaders in the police forces.
Split into simpler sentences: Since 2000 the Zimbabwean government has taken most of the farmland previously used by commercial farmers (mostly white) and reallocated it. Most of this happened in a corrupt way and land went to politicians from ZANU-PF, military leaders or leaders in the police forces.