"If Cuba discovered oil tomorrow, my country would be its greatest ally," he said.

Air pressure is our greatest ally in keeping the environment clean.

One of the greatest allies at present is the church itself.

Learn how to be the bride's greatest ally in these articles.

From the back of the room, someone yelled out a toast to Russia's greatest ally.

Should a problem occur, the assistant could be your greatest ally.

Patients will often be your greatest ally when testing yourself for the first time.

As he did so, the very things he'd always despised became his greatest allies.

A species that could be the greatest ally you've ever known.

He had known great friends once and the greatest allies anyone could ever hope to command.