TimBentley
Deity
Improvements have a defense value of 16, which is modified by terrain and fortresses/barricades.
I found a nice way to show these using the fact that a saved game saves the seed, so I'll mention it. I saved a debug game, bombarded a road on a plain, reloaded, bombarded a mountain, reloaded, and bombarded a barricade, and got different results for the plain, and the same result for the mountain and barricade (these two vary slightly in their defense value, but the results seem reasonable regardless), so that confirms that terrain modifiers hold. I got the same results attacking modern armor with a sipahi as bombarding a road on a plain with a cannon, so that confirms the defense value of 16 (this happens to be the default for citizens and buildings as well).
I found a nice way to show these using the fact that a saved game saves the seed, so I'll mention it. I saved a debug game, bombarded a road on a plain, reloaded, bombarded a mountain, reloaded, and bombarded a barricade, and got different results for the plain, and the same result for the mountain and barricade (these two vary slightly in their defense value, but the results seem reasonable regardless), so that confirms that terrain modifiers hold. I got the same results attacking modern armor with a sipahi as bombarding a road on a plain with a cannon, so that confirms the defense value of 16 (this happens to be the default for citizens and buildings as well).