How to end a filibuster: World War I and the origin of the cloture rule

The Constitution Center:

That evening, Wilson denounced “the little group of willful men” who had “rendered the great Government of the United States helpless and contemptible.”
The leaders of the new Senate, elected the previous November but not yet sworn in, announced that they would consider a new rule, called cloture, allowing debate to be shut off if a large enough majority wished to do so, and end a filibuster such as the one against arming the ships. They were as good as their word, and the rule, though modified over the years, is still in force today.