In 1848, revolutions erupted across Europe. In the face of protests and riots, Emperor Ferdinand abdicated in favor of Maximilian's brother. Maximilian accompanied him on campaigns to put down rebellions throughout the empire. Only in 1849 would the revolution be stamped out in Austria, with hundreds of rebels executed and thousands imprisoned. Maximilian was horrified at what he regarded as senseless brutality and openly complained about it. He would later remark, "We call our age the Age of Enlightenment, but there are cities in Europe where, in the future, men will look back in horror and amazement at the injustice of tribunals, which in a spirit of vengeance condemned to death those whose only crime lay in wanting something different to the arbitrary rule of governments which placed themselves above the law".