At the end of 1848, Frederick William finally issued the Constitution of the Kingdom of Prussia. The liberal opposition secured the creation of a parliament, but the constitution was largely a conservative document reaffirming the monarchy's predominance. The army was a praetorian guard outside of the constitution, subject only to the king. The Prussian Minister of War was the only soldier required to swear an oath defending the constitution, leading ministers such as Strotha, Bonin and Waldersee to be criticized by either the king or the parliament, depending on their political views. The army's budget had to be approved by the Lower House of Parliament. Novels and memoirs glorifying the army, especially its involvement in the Napoleonic Wars, began to be published to sway public opinion. The defeat at Olmütz of the liberals' plan to unite Germany through Prussia encouraged reactionary forces. In 1856 during peacetime Prussian Army consisted of 86,436 infantrymen, 152 cavalry squadrons and 9 artillery regiments.