United States History On This Date: March 30

March 30, 1822 — Florida Becomes a U.S. Territory

The United States formally organized the Florida Territory, transforming a contested borderland into an official part of the nation. The shift accelerated settlement, expanded plantation agriculture, and increased pressure on Seminole communities, setting the stage for decades of conflict and eventual statehood in 1845.

March 30, 1867 — Alaska Purchase Agreement Signed

Secretary of State William H. Seward agreed to purchase Alaska from Russia for $7.2 million. Mocked as “Seward’s Folly,” the acquisition later proved strategically and economically valuable. The transfer reshaped U.S. influence in the North Pacific and introduced new governance over Indigenous homelands.

March 30, 1870 — Fifteenth Amendment Certified

The Fifteenth Amendment was certified, guaranteeing voting rights regardless of race or previous enslavement. It marked a major Reconstruction milestone and briefly expanded Black political participation. Despite later suppression, the amendment remains a cornerstone of constitutional protections for voting rights.

March 30, 1981 — President Reagan Shot

President Ronald Reagan was wounded outside the Washington Hilton by John Hinckley Jr. Reagan, Press Secretary James Brady, and two others were injured. The event reshaped presidential security and later inspired major gun‑control legislation tied to Brady’s long‑term injuries.

This map from 1803 shows the boundries of East Florida and West Florida.  Also shown is the northern boundry of West Florida during the American Revolution in 1776