March for Our Lives (MFOL) is a student-led organization which leads demonstrations in support of gun control legislation. It took place in Washington, D.C., on March 24, 2018, with over 880 sibling events throughout the United States and around the world, and was planned by Never Again MSD in collaboration with the nonprofit organization Everytown for Gun Safety. The event followed the Marjory Stoneman Douglas High School shooting a month earlier, which was described by several media outlets as a possible tipping point for gun control legislation.

On February 14, 2018, 19-year-old Nikolas Cruz opened fire on students and staff at Marjory Stoneman Douglas High School in the Miami suburban town of Parkland, Florida, United States, killing 17 people and injuring 17 others. Cruz, a former student at the school, fled the scene on foot by blending in with other students and was arrested without incident approximately one hour and twenty minutes later in nearby Coral Springs. Police and prosecutors investigated "a pattern of disciplinary issues and unnerving behavior".