Protracted negotiations over the boundaries became alike tedious and listless. But the moment that the respective diplomats had agreed upon some knotty point, the Congress of one litigant or another was almost sure to reject the decision and start the controversy all over again. Even reference of the matter to the arbitral judgment of European monarchs produced, so far as Ecuador and Peru were concerned, riotous attacks upon the Peruvian legation and consulates, charges and countercharges of invasion of each other's territory, and the suspension of diplomatic relations. Though the United States, Argentina, and Brazil had interposed to ward off an armed conflict between the two republics and, in 1911, had urged that the dispute be submitted to the Hague Tribunal, nothing would induce Ecuador to comply. Colombia was even more unfortunate than its southern neighbor, for in addition to political convulsions it suffered financial disaster and an actual deprivation of territory. Struggles among factions, official influence at the elections, dictatorships, and fighting between the departments and the national Government plunged the country, in 1899, into the worst civil war it had known for many a day. Paper money, issued in unlimited amounts and given a forced circulation, made the distress still more acute. Then came the hardest blow of all. Since 1830 Panama, as province or state, had tried many times to secede from Colombia. In 1903 the opportunity it sought became altogether favorable. The parent nation, just beginning to recover from the disasters of civil strife, would probably be unable to prevent a new attempt at withdrawal. The people of Panama, of course, knew how eager the United States was to acquire the region of the proposed Canal Zone, since it had failed to win it by negotiation with Colombia. Accordingly, if they were to start a "revolution," they had reason to believe that it would not lack support--or at least, connivance--from that quarter. On the 3d of November the projected "revolution" occurred, on schedule time, and the United States recognized the independence of the "Republic of Panama" three days later! In return for a guarantee of independence, however, the United States stipulated, in the convention concluded on the 18th of November, that, besides authority to enforce sanitary regulations in the Canal Zone, it should also have the right of intervention to maintain order in the republic itself. More than once, indeed, after Panama adopted its constitution in 1904, elections threatened to become tumultuous; whereupon the United States saw to it that they passed off quietly.