Marine private Guy Gabaldon was 18 years old when he took part in the invasion of Saipan in the Mariana Islands in June 1944. In order to secure the island, Gabaldon began to go on “lone wolf” missions, using his smattering of Japanese to convince enemy civilians and troops to give themselves up.

“Immediately after landing on Saipan I decided that I would go off into enemy territory to fight the war as I saw fit,” he wrote in his 1990 memoir Saipan: Suicide Island. “I always worked alone, usually at night in the bush. I must have seen too many John Wayne movies, because what I was doing was suicidal.”

“My plan, as impossible as it seemed, was to get near a Japanese emplacement, bunker or cave, and tell them that I had a bunch of marines with me and we were ready to kill them if they did not surrender. I promised that they would be treated with dignity, and that we would make sure that they were taken back to Japan after the war.”

He must have been stupendously persuasive, because he captured 1,500 Japanese single-handed — including 800 on a single day in July. “When I began taking prisoners it became an addiction,” he wrote. “I found that I couldn’t stop — I was hooked.”

Gabaldon earned a Navy Cross for his efforts, and Jeffrey Hunter played him in the 1960 film Hell to Eternity. “The heroes are still over there,” he told the Chicago Tribune at the film’s opening. “Those who gave their all are the heroes.”

The Treaty of Berlin was drafted in secrecy, so its framers were astonished to find it published in the London Times. Journalist Henri de Blowitz at first refused to reveal his source, but at last relented near the end of his life. Well before the congress started he had attached a confederate to the clerical staff, but the man felt he was being watched, so the two could not dare to meet or talk. Finally de Blowitz noticed that they wore hats of the same type and color, and he hit on a plan of “childish simplicity.”

De Blowitz was staying at the Kaiserhof. Each day his confederate went there for lunch and dinner. The two never acknowledged one another, but they hung their hats on neighboring pegs. At the end of the meal the confederate departed with de Blowitz’s hat, and de Blowitz innocently took the confederate’s. The communications were hidden in the hat’s lining.

“Only twice were we forced to put off the communication till the following day,” de Blowitz wrote in his 1904 memoir. “Once, however, we had a scare.”

“One of my English colleagues, on leaving the dining-room, made a mistake and took my friend’s hat. Without looking at each other we felt, as he wrote me next day, that we turned pale. If the colleague in question had kept the hat, he might have discovered the third article of the treaty, which had been adopted at the previous day’s sitting, and also a hint of the difficulties that had arisen between Russia and England on the question of the boundaries of Bulgaria, and very disagreeable consequences for my friend might have been the result. Fortunately, on reaching the door, the Englishman put on the hat, which dropped over on his nose. He laughingly took it off and replaced it on its peg. I had risen to take the hat from him, but sat down again. I breathed freely, and my friend must have done the same.”

During the War of 1812, the Declaration of Independence hung in the office of Stephen Pleasonton, an auditor in the State Department. When word came that the British might march on Washington, Secretary of State James Monroe ordered Pleasonton to safeguard the department’s important books and papers, so Pleasonton ordered linen bags made and began filling them with documents.

As he was doing this, Secretary of War John Armstrong Jr. passed through the building and remarked that the alarm was unnecessary; he did not believe that the British planned to attack the city.

“Had he followed the advice of the Secretary of War, an irreparable loss would have been sustained,” noted the New York Times in 1905. “For the papers which Mr. Pleasonton had placed in the coarse linen bags comprised the secret journals of Congress, then not published; the correspondence of Gen. Washington, his commission, resigned at the close of the war; the correspondence of Gen. Greene and other officers of the Revolution, a well as laws, treaties, and correspondence of the Department of State, from the adoption of the Constitution down to that time.”

Pleasonton had the bags carted to a grist mill on the Virginia side of the Potomac. As he was leaving his office, he caught sight of the Declaration hanging on his wall. He took it down, cut it out of its frame, and carried it away with the other papers.

Feeling that even the grist mill was too vulnerable, Pleasonton removed the bags a further 35 miles to Leesville, where he stored them in an empty house. “Worn out with his labors, Mr. Pleasonton states in a letter, he retired early to bed that night and slept soundly. Next morning he was informed by the people of the little tavern where he had stayed that evening that they had seen during the night, the same being the 24th of August, a large fire in the direction of Washington, which proved to be the light from the public buildings, which the enemy had set on fire and burned to the ground.”

In 1891, Robert Baden-Powell wandered the mountains of Dalmatia with a butterfly net and a sketchbook. If he was accosted by one of the forts in the area, he would show his drawings to the soldiers and explain that he was hunting a particular species, and they would send him on his way.

In fact he was working as an intelligence officer for the British government. “They did not look sufficiently closely into the sketches of butterflies to notice that the delicately drawn veins of the wings were exact representations, in plan, of their own fort, and that the spots on the wings denoted the number and position of guns and their different calibres”:

The large dots denote the locations of the fort’s main guns, and the smaller show field artillery and machine-gun emplacements.

“Fortunately for us, we are as a nation considered by the others to be abnormally stupid, therefore easily to be spied upon,” he wrote in his 1915 memoir My Adventures as a Spy. “But it is not always safe to judge entirely by appearances.”