Why did Mycenae and Troy go into battle?

Mycenae and Troy went into battle primarily due to a combination of factors, including trade rivalry and the abduction of Helen, the wife of the Mycenaean king Menelaus, by Paris, a prince of Troy. This event sparked the legendary Trojan War, as Menelaus sought to reclaim his wife and restore his honor. Additionally, the conflict was fueled by broader geopolitical ambitions, with Mycenae aiming to expand its influence and control over key trade routes. The war ultimately became a symbol of heroism and tragedy in Greek mythology, particularly through the epic tales of Homer.