But, unhappily, the establishment of peace tended to weaken the slender bond which held the Union together, by turning the attention of men to the internal affairs of their own States. The advantage and the necessity of giving the regulation of foreign commerce to the general government, if perceived at all, was perceived only by a few leading statesmen. The commercial States fancied that they profited by a condition of things which enabled them as importers to levy contribution on their neighbors. The people did not as yet perceive, that, without some central authority to regulate the whole trade alike, the clashing regulations of rival States would sooner or later destroy the Confederacy. Nor were they willing to be taxed for the payment of the public debts. The people of the United States had not yet begun to feel, that such a burden is to be borne as one of the first of public and social duties. That part of the financial plan of 1783, which required from the States a pledge of internal revenues for twenty-five years, met with so much opposition, that Congress was obliged to abandon it, and to confine its efforts to that part of the scheme which related to the duties on imports. In 1786, all the States, except New York, had complied with the latter part of the plan; but the refusal of that State rendered the whole of it inoperative, and no resource remained to Congress, after the close of the war, but the old method of making requisitions on the States, under the rule of the Confederation.[183] At the return of peace, therefore, the Confederation had had a trial of two years and six months, as a government for purposes of war. It was for these purposes, mainly, that it was established; being in fact, as it was in name, a league of friendship between sovereign States, for their common defence, the security of their liberties, and their mutual and general welfare; the parties to which had bound themselves by it to assist each other against all external attacks. Doubtless the framers of the Confederation contemplated its duration beyond the period of the war; for, besides the perpetual character of the Union, which it sought and professed to establish, it had certain functions which were manifestly to be exercised in peace as well as in war. These functions, however, were few. The government was framed during a revolutionary war, for the purposes of that war, and it went into operation while the war was still waged; taking the place and superseding the powers of the Revolutionary Congress, under which the war had been commenced and prosecuted.