The treaty's 155-millimetre figure leads into a wider discussion of why a few calibre families recur across decades. The later NATO 155-millimetre artillery standard is contrasted with Russian 152-millimetre practice and interwar French use of related calibres. The discussion then speculates that naval six-inch-class weapons could return. Water cooling, larger ammunition supplies, longer barrels, and higher operating pressures could support rapid fire and substantial guided projectiles. Railguns appear as one possible route, making this a modern technical comparison prompted by the treaty rather than a prediction contained in the 1930 agreement.
Notable Point · 17:30-19:51
Why 155-millimetre guns keep returning
A discussion of 152- and 155-millimetre weapons connects the treaty's calibre wording to later artillery standards and speculative future naval guns.