In a sense I agree. The rocket issue: yes, only the Brits had them, and only the Brits had any real experience in what was needed to make them work. But . . . if the French had ever decided it was really worth while to develop them, I see no reason why they could have come up with something similar, relatively quickly. Some techs, like ironclad steamships, are still 20-40 years in advance of the game time frame, and should legitimately be restricted. But the military technology of the period was fairly ubiquitous. Where one nation had an advantage over another, it was generally in the details of production and organization, not in the technique itself. Case in point are rifle units. The ability to manufacture rifles was theoretically available to any Western nation of the period. That many nations chose not to field many, if any, rifle units was an intentional decision stemming from doctrine and priorities, not a technological limitation.