Organizers across the country named the mobilization “No Kings.” The rallies were organized in opposition to a military parade in Washington, D.C. on the president’s 79th birthday Saturday. The parade is happening on Flag Day, which also marks the U.S. Army’s 250th anniversary this year.

Yesterday, according to estimates by event organizers, millions marched in protest against the Trump administration, including its recent controversial immigration enforcement raids. Hundreds of “No Kings” demonstrations took place in cities and towns throughout the U.