Crossword Puzzle Joined forces?

Clue: Joined forces?

She joined forces with Prince during the "Purple Rain" recording sessions (SHEILAE with 7 letters)
Joined forces (e.g. MERGED with 6 letters)
Joined forces (with) (SIDED with 5 letters)
When the USA and USSR joined forces (WWII with 4 letters)
Joined forces with (SIDED with 5 letters)
Joined the armed forces (ENLISTED with 8 letters)
Quebec Forces Base (MONTREAL with 8 letters)
Join forces (e.g. ALLY with 4 letters)
It joined the EU in 2004 (MALTA with 5 letters)
Newfoundland Forces Base (GANDER with 6 letters)