The Secret Service Was Created to Fight Counterfeiting
On April 14, 1865—the very day he was assassinated—President Abraham Lincoln authorized the creation of the Secret Service. However, their original mission wasn't presidential protection. It was combating rampant counterfeiting. At the close of the Civil War, an estimated one-third of all paper currency in circulation in the United States was fake, threatening to collapse the young nation's economy.
A Currency Crisis in Post-Civil War America
In the mid-nineteenth century, the United States monetary system was chaotic and vulnerable. Before the Civil War, the federal government did not issue a standardized national paper currency. Instead, thousands of state-chartered private banks printed their own individual banknotes across a dizzying array of designs, denominations, and security standards. When the Union government introduced national paper notes—known as greenbacks—in the 1860s to fund the war effort, counterfeiters quickly capitalized on the public's unfamiliarity with the new legal tender.
By the close of the Civil War in 1865, illicit printing operations had inundated the country with forged bills. Historians and contemporary government reports estimate that between one-third and one-half of all paper currency in circulation was counterfeit. This scale of fraud compromised everyday trade, degraded faith in the federal government's credit, and threatened to destabilize an economy already strained by years of devastating war.
Local police forces and private detective agencies lacked the jurisdictional reach and resources to dismantle interstate counterfeiting rings. Con artists could manufacture fake plates in one state, print the bogus currency in another, and pass the notes across distant state lines with relative impunity. It became obvious to federal authorities that preserving economic stability required a dedicated national law enforcement response.
Lincoln's Authorization and the Agency's Founding
On April 14, 1865, Secretary of the Treasury Hugh McCulloch met with President Abraham Lincoln to discuss solutions to the escalating monetary crisis. McCulloch urged the president to create a specialized federal bureau under the Department of the Treasury dedicated exclusively to tracking down counterfeiters and restoring confidence in American money. Lincoln approved the plan, signing off on the initiative only hours before he attended Ford's Theatre, where he was fatally shot by John Wilkes Booth.
Despite Lincoln's death, the Treasury Department moved ahead with the directive. On July 5, 1865, the United States Secret Service Division was officially sworn into existence in Washington, D.C., with William P. Wood named as its first chief. Wood was a veteran investigator who set out to build a network of skilled operatives capable of infiltrating criminal underworlds and seizing illegal printing presses.
The newly formed division did not possess a permanent administrative framework initially, operating largely as a temporary investigative force. However, its early successes against sophisticated counterfeiting syndicates quickly demonstrated the enduring necessity of a federal investigative agency within the Treasury Department.
The First Broad Federal Detective Bureau
Because the Secret Service was the only federal investigative agency in the United States for decades, its early mandate expanded far beyond suppressing illicit currency. Congress and executive departments regularly turned to Secret Service operatives to investigate a wide variety of federal crimes that local and state law enforcement were unequipped or unwilling to handle.
During the Reconstruction era and late nineteenth century, Secret Service operatives were deployed to investigate cases of federal tax evasion, illicit gambling, smuggling, mail robbery, and public land fraud across the western frontier. They were also tasked with investigating the Ku Klux Klan to protect civil rights enforcement in the South, as well as conducting counterintelligence operations against foreign spies during the Spanish-American War.
This sweeping purview made the Secret Service the de facto general federal law enforcement arm of the United States. Operatives traveled undercover across jurisdictions, using pioneer forensic techniques, tracking financial records, and building criminal profiles long before modern federal law enforcement structures were established.
The Shift Toward Presidential Protection
Presidential protection was not part of the Secret Service's early duties. During the nineteenth century, American presidents generally moved in public with minimal or informal security, relying on local police details or personal bodyguards. Even after Lincoln's assassination in 1865 and the assassination of President James A. Garfield in 1881, the federal government did not establish a permanent, specialized protective detail for the chief executive.
The turning point came in September 1901, when President William McKinley was assassinated by Leon Czolgosz at the Pan-American Exposition in Buffalo, New York. McKinley became the third sitting president murdered in thirty-six years. The tragedy spurred widespread public outcry and prompted Congress to unofficially request that the Secret Service assume responsibility for presidential security.
Initially, the agency assigned a small team of operatives to guard President Theodore Roosevelt around the clock. By 1906, Congress formally codified this responsibility into federal law, allocating specific funding for the Secret Service to protect the president as a permanent, statutory duty.
Splitting Protection from General Federal Crime
As the Secret Service took on presidential protection while continuing to investigate broad federal offenses, concerns arose over the concentration of investigative power within a single Treasury division. President Theodore Roosevelt and Attorney General Charles Bonaparte sought a dedicated investigative body that answered directly to the Department of Justice.
In 1908, the Department of Justice created the Bureau of Investigation—which later became the Federal Bureau of Investigation (FBI). With the establishment of the FBI, general federal crimes, interstate violations, and domestic espionage were shifted out of the Secret Service's jurisdiction. This reform allowed the Secret Service to concentrate its resources on its two primary obligations: safeguarding the nation's financial infrastructure and protecting national leaders.
Over the decades that followed, Congress expanded the agency's protective remit. The Secret Service was gradually authorized to protect the Vice President, the President-elect, immediate family members of the executive, former presidents and their spouses, major presidential and vice-presidential candidates, and visiting foreign heads of state.
The Modern Dual Mandate
Today, the Secret Service operates under a distinct dual mandate that directly reflects its complex history: protective operations and financial investigations. While television and media coverage frequently emphasize presidential motorcades and physical protection, thousands of special agents and analysts dedicate their careers to policing financial systems.
The investigative branch has evolved from pursuing physical copper engraving plates and printing presses to targeting high-tech financial crimes. Modern Secret Service operations investigate complex electronic payment fraud, identity theft, unauthorized network intrusions, sophisticated wire fraud, and state-sponsored counterfeiting rings around the globe.
In March 2003, as part of a major federal reorganization following the September 11 terrorist attacks, the Secret Service was transferred from the Department of the Treasury—its home for nearly 138 years—to the newly created Department of Homeland Security. Despite this move, the agency retains its original mission established at the end of the Civil War: defending the structural integrity of the American financial system.
Key takeaways
•The Secret Service was created in 1865 under the Department of the Treasury specifically to combat rampant counterfeiting, which affected an estimated one-third to one-half of all U.S. paper currency after the Civil War.
•President Abraham Lincoln authorized the creation of the Secret Service on April 14, 1865, just hours before he was assassinated at Ford's Theatre.
•Presidential protection was not assigned to the Secret Service until after the 1901 assassination of William McKinley, receiving permanent statutory funding in 1906.
•The agency maintains a dual mandate today under the Department of Homeland Security, investigating modern cyber and financial crimes alongside its high-profile protective duties.