A few examples of the attempts by the monarchies through their banks that almost succeeded in destroying the United States:
According to the Tennessee Laws (1715-1320, vol. II, p. 774), in the 1794 Jay Treaty, the United States agreed to pay 600,000 pounds sterling to King George III, as reparations for the American Revolution. The Senate ratified the treaty in secret session and ordered that it not be published. When Benjamin Franklin's grandson published it anyway, the exposure and resulting public up-roar so angered the Congress that it passed the Alien and Sedition Acts (1798) so federal judges could prosecute editors and publishers for reporting the truth about the government.
Since we had won the Revolutionary War, why would our Senators agree to pay reparations to the loser? And why would they agree to pay 600,000 pounds sterling, eleven years after the war ended? It doesn't make sense, especially in light of the Senate's secrecy and later fury over being exposed, unless we assume our Senators had been bribed to serve the British monarchy and betray the American people! That is subversion! The United States Bank had been opposed by the Jeffersonians from the beginning, but the Federalists (the pro-monarchy party) won out in its establishment. The initial capitalization was $10,000,000 -- 80 % of which would be owned by foreign bankers. Since the bank was authorized to lend up to $20,000,000 (double its paid capital), it was a profitable deal for both government and the bankers, since they could lend, and collect interest on $10,000,000 that didn't exist.
However, the European bankers out-foxed the U.S. government, and by 1796, the government owed the bank $6,200,000 and was forced to sell its shares. (By 1802, our government owned no stock in the United States Bank!)
The sheer power of the banks and their ability to influence representative government by economic manipulation and outright bribery was exposed in 1811, when the people discovered that European banking interests owned 80 % of the United States Bank. Congress therefore refused to renew the Bank's charter. This led to the withdrawal of $7,000,000 in specie (money in coin) by European investors, which in turn, precipitated in economic recession, and the War of 1812.
There are undoubtedly other examples of the monarchy's efforts to subvert or destroy the United States; some are common knowledge, others remain to be disclosed to the public. For example, national archivist David Dodge discovered a book called "2 VA LAW" in the Library of Congress Law Library. According to Dodge, "This is an un-catalogued book in the rare book section that reveals a plan to overthrow the Constitutional government by secret agreements engineered by the lawyers of the time." That is one of the reasons why this Amendment was ratified by the state of Virginia in the particular manner in which they did, although the alleged notification thereof was a long time thereafter claimed to have been lost in the mail. You see, there is no public record that this aforementioned book exist[ed] either!"
That may sound surprising, but according to the Gazette (5/10/91), "the Library of Congress has 349,402 un-catalogued rare books and 13.9 million un-catalogued rare manuscripts." There may be secrets buried in that mass of documents even more astonishing than a missing Constitutional Amendment.