What the treaty stopped each navy building

For Britain, the G3 battlecruisers matter because a global maritime strategy demanded speed and the ability to threaten trade routes far from home. France had no equally mature modern answer: the Lyon design remained a prewar paper project, while the Normandies had been overtaken by newer foreign work. Japan's Tosa and Amagi projects are treated as more immediately useful losses than a distant next generation. The Francesco Caracciolos might have accelerated the fast-battleship concept because a ship in service would have forced a more urgent response than a paper design. The American loss is framed around the Lexington battlecruisers' long-range cruiser-hunting role, a capability later sought in heavily armed treaty cruisers.