1.   Britain and France Decided to unite and fight against their common enemy.

2.   The Allies worked to defeat a common enemy.

3.   The common enemy that united them was communism.

4.   We must work together against the common enemy.

5.   The two countries were united against a common enemy.

6.   They could fight shoulder-to-shoulder against a common enemy.

7.   Oil must be used as a weapon against the common enemies of the Muslims.

8.   It was undoubtedly a valuable public demonstration of convergence by the two powers against common enemies.

9.   Where once they fought pitched battles against each other they have now joined hands to fight the common enemy the FA and greedy clubs.

10.   And it is likely that if the U.S. sends in ground troops, they will once again find a common cause and a common enemy.