The Congress also proceeded, as the legislative authority of the United Colonies, to create a continental currency, in order to defray the expenses of the war. This was done by issuing two millions of dollars, in bills of credit, for the redemption of which the faith of the confederated colonies was pledged. A quota of this sum was apportioned to each colony, and each colony was made liable to discharge its proportion of the whole, but the United Colonies were obligated to pay any part which either of the colonies should fail to discharge.[36] The first of these quotas was made payable in four, the second in five, the third in six, and the fourth in seven years from the last day of November, 1775, and the provincial assemblies or conventions were required, by the resolves of the Congress, to provide taxes in their respective provinces or colonies, to discharge their several quotas.[37] The Congress also directed reprisals to be made, both by public and private armed vessels, against the ships and goods of the inhabitants of Great Britain found on the high seas, or between high and low water-mark; this being a measure of retaliation against an act of Parliament, which had authorized the capture and condemnation of American vessels, and which was considered equivalent to a declaration of war. They also threw open the ports of the United Colonies to all the world, except the dominions and dependencies of Great Britain. Further, they established a general Treasury Department, by the appointment of two joint Treasurers of the United Colonies, who were required to give bonds for the faithful performance of the duties of their office,[38] and they organized a general Post-Office, by the appointment of a Postmaster-General for the United Colonies, to hold his office at Philadelphia, to appoint deputies, and to establish a line of posts from Falmouth in Massachusetts to Savannah in Georgia, with such cross posts as he should judge proper.[39] The proceedings of the Congress on the subject of the Militia were, of course, in the nature of recommendations only. They advised the arming and training of the militia of New York, in May, 1775,[40] and in July they recommended to all the colonies to enroll all the able-bodied, effective men among their inhabitants, between sixteen and fifty years of age, and to form them into proper regiments.[41] The powers of the Congress to call into the field the militia thus embodied were considered to be subject to the consent of those exercising the executive powers of government in the colony, for the time being.[42]