Related Clues:

• Partners or confederates
• They join and fight together
• Associates, confederates
• Mutual supporters, like countries through treaty
• Friends who band together
• Nations joining together to fight a common enemy
• Nations aligned against Germany in WW2
• They are banded together for mutual support
• Joins or brings together
• They join together as in war
• Encounters, perhaps by appointment
• Comes together
• They support and encourage each other
• 'Accumulates, gathers (7)'
• 'Friendly, helpful nations (6)'