Martin Luther King Jr. encountered numerous challenges as a leader, including significant opposition from both racist groups and governmental entities. His nonviolent approach faced criticism from those who favored more militant methods. King dealt with the intense pressures of leading large-scale protests, such as the Selma to Montgomery marches, where he faced police brutality. His commitment to peace was tested, especially during turbulent moments like the 1963 Birmingham campaign, where he was jailed. Despite these trials, King remained resolute, emphasizing the importance of justice and community empowerment. His experiences shaped his leadership style and strengthened his resolve in the fight for civil rights.