When the First Invasion began, Andrew joined the Resistance group under Julie Parrish's command. He was willing to go into battle and, using his experience in Africa and other hostile nations, proved himself to be a capable soldier and helped his fellow rebels on a variety of missions. He still continued his religious duties, such as performing sermons, "last rites" ceremonies (for terminally injured rebels), eulogies at funerals and other religious services. He also had a secret desire for peace with the Visitors as he saw the entire war as a waste of life.