JACKSONVILLE, Fla. — As the U.S. Army celebrates its birthday on June 14, 2026, the U.S. Army Corps of Engineers celebrates its 251st birthday two days later, on June 16th. The Jacksonville District’s continuum legacy stretches back more than 140 years in Florida, combining military engineering expertise, environmental stewardship, navigation improvements, flood-risk reduction, ecosystem restoration and emergency response into one of the most diverse missions in the federal government.