A Treaty of Alliance between the French and the Continental Army followed in 1778, which led to French money, matériel and troops being sent to the United States. An ignition of a global war with Britain started shortly thereafter. Subsequently, Spain and the Dutch Republic also began to send assistance, which, along with other political developments in Europe, left the British with no allies during the conflict (excluding the Hessians). Spain openly declared war in 1779, and war between British and Dutch followed soon after.