The scenario imagines Britain launching the 400,000-ton Colossus in 1905 and asks how the United States would respond. Existing Tillman maximum-battleship studies would appear modest beside a ship carrying twelve 20.9-inch guns. American designers would face pressure to scale their own capital-ship ambitions upward, turning one impossible vessel into an arms-race benchmark. Its beam would also make the Panama Canal a strategic constraint, potentially requiring reconstruction if U.S. ships built to match it were to move between oceans. The counterfactual shows how capital-ship competition can affect shipyard capacity, national infrastructure, and strategic mobility.
Notable Point · 1:07:40-1:09:12
How Colossus would reshape a naval arms race
The counterfactual moves beyond combat power to ask how a 400,000-ton British battleship would force American design and canal infrastructure to respond.