Ladies and Gentlemen:

I would appreciate some assistance with the following translation:

Wenn Friedrich, Gustav Adlof, Condé, Cäsar und Alexander keine Theorie gehabt und den Krieg nicht nach Regeln studiert hätten, wie hätten sie denn in einem Alter Armeen commandiren, Bataillen gewinnen und Eroberungen machen können, da einer so wenig als der andere Erfahrungen haben konnte?

My translation follows:

If Frederick, Gustavus Adolphus, Condé, Caesar and Alexander possessed no theory, and had not studied war according to principles, how could they have commanded armies in old age, won battles and made conquests, as neither the one nor the other could have much experience?

Thanks so much for your support.

Chuck White