Bring somebody/something to heel
Definition 1 of 1
Pro Tip 1/3Power Dynamic
The phrase suggests a power imbalance where one entity enforces obedience on another. 
The company CEO brought the entire board to heel with his new policies.
Pro Tip 2/3Asserting Authority
It's often used when someone asserts their authority to control a situation or group. 
After the merger, the new director swiftly brought the staff to heel.
Pro Tip 3/3Negative Connotation
Can imply strict or harsh measures taken to ensure compliance. 
The regime tried to bring the protesters to heel through intimidation.