* The allied forces fought bravely against the enemy. (referring to countries working together)
* Our interests are allied with theirs in this matter. (referring to shared goals)
* The two companies allied to create a new product. (referring to a partnership)
* Her career aspirations are allied with her passion for social justice. (referring to connections between things)
* The allied nations signed a peace treaty after the war. (referring to nations on the same side of a conflict)
Let me know if you'd like to see more examples!