What if the United States also possessed a Hood-like capital ship when the Washington Naval Conference began?
Short answerA large American ship would make the historical 35,000-ton ceiling harder to defend, pushing the agreement toward roughly 42,000 tons or making the negotiations fail altogether.
NotesAn American Hood or completed Lexington would be another existing ship that negotiators could not bargain away easily. If both Britain and the United States possessed capital ships above 40,000 tons, Japan would have a strong case for an equivalent design. The likely compromise becomes a standard displacement near 42,000 tons instead of the historical 35,000. If that higher baseline still failed to satisfy the parties, the accumulating exceptions could cause the treaty process to collapse.