Make common cause with somebody

Pro Tip 1/3

Shared Goals

Use when individuals or groups work together due to shared objectives, not necessarily lasting friendship.

Environmentalists and fishermen made common cause to protect the bay.

Pro Tip 2/3

Temporary Alliance

The phrase often implies a temporary alliance, not a permanent partnership.

The opposing political parties made common cause to pass the emergency bill.

Pro Tip 3/3

Mutual Opposition

It's commonly used when groups unite to oppose a mutual threat or enemy.

Several nations made common cause to combat climate change.