What developments enabled brandenburg prussia austria and russia to emerge as major powers in the seventeenth century?

The development that enabled Brandenburg Prussia, Austria and Russia to emerge as the major powers in the seventeenth century is because of the work of the Hohenzollern dynasty in which led to their emergence in which improved the standing of the army.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.