American opposition need not end the alliance

If the United States wanted the Anglo-Japanese alliance ended, was its survival effectively impossible?

Not necessarily. Changes in American policy or diplomatic missteps could leave Britain and Japan enough room to preserve or rebuild the relationship.

Strong American opposition matters without making the outcome inevitable. The three survival routes change U.S. involvement, British leverage, or dominion pressure. American diplomacy could also undermine its own objective through poor signaling. Changes in any of these mechanisms could preserve the alliance despite Washington's preference.