The Secret Service began on July 5, 1865

The U.S. Secret Service was officially established on July 5, 1865—nearly three months after Abraham Lincoln was assassinated. The date is often paired with the irony that the agency now protects presidents, but that was not its original job.

A counterfeiting problem, not a protection detail

After the Civil War, counterfeit money was a serious threat: forged bills could undermine confidence in the rapidly expanding national currency. The Treasury Department created the Secret Service to investigate counterfeiting and protect the country’s money. It was a law-enforcement agency from the start, but its central mission was financial crime, not presidential security.

That distinction explains the apparent plot hole. Lincoln did not create a presidential protection force that somehow failed to guard him; the agency was established after his death and for a different purpose. Protection of the president became part of the Secret Service’s duties only later. The agency’s founding date therefore marks the beginning of a fight against forged currency—not the beginning of the White House security detail people associate with it today.