Initially, the plan was adopted only on an informal basis, but was ratified at the “Arcadia” conference in Washington in December 1941. The result was the strengthening of U.S. Navy forces operating in the Atlantic, as well as the sending of the new British battleship Prince of Wales and the former battle cruiser Repulse into far eastern waters. This was consistent with the consensus that the security of the community and the British Empire, including maintaining a Position of the Far East, should be maintained in all circumstances. The third cornerstone of the agreement of the three powers was that the security of maritime communication between allied powers is essential. Finally, if Japan goes to war, the military strategy in the Far East will be defensive.  Although the ABC-1 agreement was not a military alliance, it meant that the United States was preparing to go to war on the allied side, that the United States would do everything to maintain the security of the British Commonwealth, and that the U.S. military was modifying existing war plans (for example. B RAINBOW plans) to integrate military integration and cooperation with other nations. An ABC agreement is a contractual agreement between an investment company and its broker, which allows the company to acquire a seat (membership) on the New York Stock Exchange (NYSE). The general principles of the agreement suggested that the territorial interest of the United States was in the Western Hemisphere; That the security of the United Kingdom and its empire and community must be preserved in all circumstances, including maintaining a position in the Far East; and that the security of maritime communication between allied powers was essential.
It is an important advantage for a broker employed by an investment company to have him buy his NYSE headquarters. To this end, an ABC agreement is a protective measure of the investment company that ensures that a broker, if he decides to leave the company, does not damage the reputation of his former employer on the stock exchange. It was the first U.S., British and Canadian military agreement (hence the term) reached at the secret Washington conference between the top military officials of the three countries (January 29 and March 27, 1941).