what effect did John Hayes open door policy letters have an imperial powers of Britain, France, Germany, Russia in Japan. It provoked the imperial powers to declare war on the United States, it caused the imperial powers to restrict trade in their trade with China, it warned the imperial powers that the United States would soon declare , Or its signal to those power that the United States would take a larger role in world affairs than before
. The effect of John Hay's open door policy letters on the imperial powers of Britain, France, Germany, Russia, and Japan was mainly to warn them that the United States would seek to ensure access to Chinese markets and prevent any one power from dominating China. The letters served as a signal that the United States would take a more active role in world affairs and advocate for open and equal trade with China. This ultimately helped to prevent the imperial powers from restricting trade and ensured that the United States had a seat at the table in discussions regarding China's future.
