
It was the American Civil War.
In February, 1862, the city of  Nashville, Tennessee, was captured by Union forces.  This began one of  the strangest episodes in North American military history.
Overnight  Nashville was converted into a supply depot for the Union's southward  moving forces. The amount of locomotive and riverboat traffic increased  dramatically, as did the population of Union soldiers. Some were  stationed there, others were passing through on their way to different  fronts.
And prostitutes, the eternal ancillary business to  military campaigns, became prevalent. An area of town called Smokey Row  (named after the opium dens) featured over 70 brothels. Aside from  thousands of soldiers, rumored clientele included Lincoln's future  assassin John Wilkes Booth, and Lincoln's successor to the Presidency,  Andrew Johnson (no link aside from coincidence has ever been uncovered).
Syphilis and gonorrhea were rampant. Soldiers and prostitutes equally became ill from diseases spread in Smokey Row.
Pvt.  Franklin Bailey wrote his mother that he'd need a dictionary "to find  words enough, and then I could not find them bad enough, to express my  hatred of those beings calling themselves women" in Smokey Row. Later in  the same letter, however, he tried his best (perhaps he borrowed a  thesaurus) and wrote that they were "abominable, low, vile, mean, lewd,  wanton, dissolute, licentious, vicious, immoral, and wicked."
Pvt.  Bailey, however, was an exception. The general feeling of most troops  was that "No man can be a soldier unless he has gone through Smokey Row"
The  Union commanders were less concerned with morals than they were with  military capabilities. With many of their troops hospitalized from  sexually transmitted diseases, the ability to launch further military  campaigns was impaired.
Punishing soldiers didn't help. Nor did medical lectures. And antibiotics were in their infancy.
Something had to be done. Since the soldiers were needed to fight the war, they couldn't leave.
And so, on July 6, 1863, General James Morgan issued "Special Order No. 29".
This  order basically said that prostitutes in Nashville were to be  rounded up and sent somewhere else. How and where weren't specified.
And so into the picture entered a plain 3-month-old steamboat named Idahoe and her captain/owner, John Newcomb.
Idahoe  was one of many steamboats at the waterfront under charter to the army.  History has not recorded why she was chosen out of the many available.
Union  forces rounded up hundreds of women from Smokey Row, storming buildings  and catching women who tried to jump out of windows to escape.  Non-prostitutes were also inadvertently nabbed in the confusion, just  from being too close to that part of town during the operation, and  required family to free them.
On the morning of July 8, Capt.  Newcomb was finishing his breakfast coffee on board the Idahoe, when he  was assaulted by noise. As he walked to the gangplank he was met by  Colonel George Spalding, who handed him an order that read, "You are  hereby directed to Louisville, Kentucky with 100 passengers put on board  your steamer today, allowing none to leave your boat before reaching  Louisville."
Even as Newcomb read this, the ladies were being  driven on board. He was given no money to buy food for them, nor guards to enforce discipline.
How many  women were put on board the Idahoe is unknown. The ship was built for  100 passengers. No reliable count was taken, and the best estimate is  150-200.
The journey to Louisville was a nightmare for Newcomb.  His unwanted passengers destroyed the boat's once luxurious furnishings.  He had to buy ice (for fevers) and food, at his own expense. Places where  he stopped for supplies put guards at the dock to keep the women from  disembarking.
The prostitutes continued to ply their trade,  waving at men as they went upriver, and raising their dresses to  advertise. Customers rowed themselves on board for brief stays as the  Idahoe chugged slowly along.
By the time he got to Louisville on  July 14, word of his unusual cargo had preceded him, and local  authorities refused to allow him to disembark the ladies. Instead, he  was ordered to proceed to Cincinnati. Kentucky's military governor  assigned several soldiers to the Idahoe to serve as guards to help  enforce discipline. This quickly failed, as the men given this coveted  assignment received free services from the passengers.
By  the time he got to Cincinnati, of course, the local government also  refused to let him unload his passengers. Newport, Kentucky, on the  other side of the river, didn't want the "frail sisterhood" (as the  local newspaper called them), either.
So with nowhere to go, the  Idahoe anchored off Cincinnati for several days, and turned a brisk  business as a floating brothel while Captain Newcomb aged rapidly.  Somehow he  managed to persuade the army to telegraph Washington D.C.  for a decision, and the question went all the way to U.S. Secretary of  War (now called Secretary of Defense) Edwin Stanton.
Stanton  was managing the complex issues of a war covering half a continent and  an ocean, and was likely stunned by the unusual decision that showed up  on his desk that day. He came up with a direct solution: Take them back  to Nashville, and deal with it.
So on August 3rd the Idahoe  returned to Nashville, and it's passengers resumed their usual lifestyle.  This gave the headache back to the Union commander (now General  Robert Granger) who spent a few days trying to find a solution, and  finally came to a very pragmatic one: he legalized prostitution.
Under  the new rules, each "public woman" had to have a license ($5) but  needed to pass a medical examination first. She was then required to  have another exam every 10 days in order to keep her license.
The  solution was a success. Suddenly the "wayward women" had a legal  profession. Disease control (by the standards of the time) improved. The  prostitutes now had access to medical care that they didn't have  previously. The Union doctors assigned to the "Hospital for the  Reception of Valetudinarian Females from the Unhealthy Purlieus of  Smokey" (yes, that really is what they called it) began taking notes,  and wrote some of the first detailed reports on the sociology of  prostitution.
The program was such a success that physicians from other cities came to study it.
Captain  Newcomb spent the next 2 years trying to get reimbursed, meeting with military officials and  eventually pleading his case in Washington. Finally, on October 19,  1865, he received payment of $5316.04. This was the amount he'd been  asking for from the beginning for damages, new furniture, fuel, food  and medicines purchased, etc.
He had a long career on the river, but never shook off the reputation as the "captain of the floating whorehouse".
He sold the Idahoe a few years later. In 1869 she was lost in the Washita River, cause unknown.