The Kingdom of Epirus was an ancient Greek state located in the northwestern part of Greece, primarily in the region of Epirus. It emerged in the 4th century BCE and became notable for its powerful monarchy and military strength. The kingdom was known for its strategic location, which allowed it to control important trade routes and engage in conflicts with neighboring states. One of the most famous rulers of Epirus was Pyrrhus, who reigned in the 3rd century BCE. He is best known for his battles against the Romans, which led to the term "Pyrrhic victory," referring to a win that comes at such a significant cost to the victor that it is almost tantamount to defeat. The kingdom eventually declined and was absorbed into the expanding Roman Empire.