The more powerful country opened the door of the weaker one by gunboat diplomacy.
强国用炮舰外交打开了弱国的大门。
超级大国的兴衰
The United States had been interested in the Pacific for half a century already, in 1853 the US had sent a fleet to Japan to bully the Japanese into a treaty relationship through gunboat diplomacy do business or we shoot.
In international politics, gunboat diplomacy (or "Big Stick ideology" in U.S. history) refers to the pursuit of foreign policy objectives with the aid of conspicuous displays of naval power—implying or constituting a direct threat of warfare, should terms not be agreeable to the superior force.