Conversation so far:
who was involved in the washington naval conference
The Washington Naval Conference was attended by nine nations—the United States, Japan, China, France, Britain, Italy, Belgium, Netherlands, and Portugal.
what was the Washington Naval Conference about
The Washington Naval Conference was a disarmament conference.
when did the Washington Naval Conference happen
The Washington Naval Conference was held in Washington, D.C., from November 12, 1921 to February 6, 1922.
what was the result of the Washington Naval Conference
The Washington Naval Conference resulted in three major treaties: Four-Power Treaty, Five-Power Treaty, the Nine-Power Treaty, and a number of smaller agreements.

Question: did the treaties hold
Self-contained rewrite: did the treaties established at the Washington Naval Conference hold