From battling insurgents to securing provincial elections, USIP military fellow Colonel Jim Modlin saw firsthand how the war in Iraq evolved over the course of his four deployments to the country. Twenty years later, Modlin discusses why he regrets not engaging more with the Iraqi people on a personal level during his first deployment, his experience helping guide a fledgling peace process to prevent sectarian violence in northwestern Iraq, and the lessons that the United States cannot afford to forget from the war.