The Seven Years' War was fought between 1755 and 1764, the main conflict occurring in the seven-year period from 1756 to 1763. It involved every great power of the time except the Ottoman Empire, and affected Europe, North America, Central America, West Africa, India, and the Philippines. Considered as the greatest European war since the Thirty Years War of the 17th century, it once again split Europe into two coalitions, led by Great Britain and France, respectively. For the first time, aiming to curtail Britain and Prussia's ever-growing power, France formed a grand coalition of its own.