treachery

他的背叛导致整个行动计划失败。

His ___treachery caused the entire operation to fail.

他的背叛行为最终导致了团队的解散。

His ___treachery eventually led to the breakup of the team.

他的背叛让整个团队陷入了困境。

His ___treachery left the entire team in a difficult situation.