Wildest as in..?
I finished reading Maldita Guerra, which is the current de facto book detailing the Paraguay War (1864-1870). Francisco Solano López, Paraguay's dictator at the time, is possibly the worst thing to have happened to the country. The fucking psycho established a cult of personality (saint figures in churches were removed to put photos of him), the only newspaper allowed to print was always cheering on how great and perfect he was, plus a secret police to ensure nobody would dare rise up against him. Oh, and the population was incentivized to denounce anyone that didn't show enough love for the president.
To make matters worse, there was no real justice system. If you were accused of treason or conspiracy, you were as good as dead, no recourse. Oh, and López' head was deep inside his own ass, any war reports that showed difficulties or stated losses from the Paraguayan army were rebuked and the person could end up dead for giving the bad news. The fucking asshole willfully ignored facts while giving orders to his army. He could've wiped the Triple Alliance's forces when they began the counterattack, but his "strategic genius" was composed of himself and nobody else.