Related Clues:

• Colleague
• Good buddy
• Comrade in arms
• Pal, slangily
• England, to the U.S.
• Comrade
• Friend in a fray
• Russia, during WWII
• Crony
• Partner in peace
• Treaty partner
• Foul-weather friend
• Accomplice
• Role for Calista
• Party to a defense treaty