Who was involved in the Persian Wars?

Greco-Persian Wars, also called Persian Wars, (492–449 bce), a series of wars fought by Greek states and Persia over a period of almost half a century. The fighting was most intense during two invasions that Persia launched against mainland Greece between 490 and 479.

Why were the wars fought?

In the 1800s, the United States fought in four wars. The War of 1812 was between the United States and Great Britain. This war ended in 1815. Francis Scott Key wrote the national anthem during this war.