How did the American Revolution become an international conflict and not just a colonial war against the British?

The American Revolution evolved into an international conflict as foreign powers recognized the potential to undermine British dominance. France, seeking revenge for its loss in the Seven Years' War, actively supported the American colonies by providing military aid, supplies, and financial assistance, culminating in a formal alliance in 1778. Spain and the Dutch Republic also became involved, either directly or indirectly, by supporting the American cause or engaging in conflicts with Britain themselves. This broader geopolitical context transformed the struggle for American independence into a global confrontation against British imperial interests.