Why did the leader of France involve France in the Thirty Years' War?

The decision by the leader of France, Cardinal Richelieu, to involve France in the Thirty Years' War was primarily motivated by the aim to prevent the Habsburgs from gaining more power in central Europe. During this period, the Habsburg family ruled over significant territories, including the Holy Roman Empire and Spain, which posed a potential threat to France's own security and influence in the region.

By intervening in the war, France sought to counterbalance the Habsburgs' power, fostering an environment where they would not dominate Europe. Richelieu recognized that strengthening the position of the Habsburgs could lead to a united front that would jeopardize French interests, thus making it imperative to disrupt their ascendancy.

While other motivations such as territorial expansion or forming alliances may have been considerations, the overriding concern was the Habsburg threat. This strategic move was aimed at reshaping the political landscape of Europe, ensuring that France could maintain its sovereignty and influence amidst a shifting balance of power.