Simple:
* The two countries formed an alliance to protect their shared interests.
* The alliance between the kingdoms was fragile and easily broken.
* The students formed an alliance to study for the difficult exam.
Descriptive:
* The alliance between the superpowers was based on a complex web of political and economic ties.
* The alliance of nations fought together to defeat the common enemy.
* The alliance between the two companies was beneficial, leading to increased profits for both.
Figurative:
* The alliance of the wind and the rain created a powerful storm.
* He forged an alliance with his fears, learning to confront them head-on.
* The artist's paintings were an alliance of vibrant colors and abstract forms.
You can also use "alliance" as a noun:
* The alliance was a key factor in winning the war.
* The alliance of nations had a significant impact on global politics.
* The alliance between the two companies was a strategic move.
The best way to use "alliance" in a sentence will depend on the specific context and meaning you want to convey.