But Mr Bo's case is about far more than personal rivalries between senior officials as they prepare for a shuffle of the party's leadership later this year.
The shuffle clearly signalled all-out war: the party bosses were hoping to plant the government flag in the heart of the territory that Mr Savimbi once held.
As chief of the party's Organisation Department until last month, Mr Zeng played a key role in the selection of officials for promotion in the build-up to the Communist Party's 16th Congress, which preceded the Politburo shuffle.