Coffee in World War II and the Mystery of the Cup of Joe

Why is coffee called a cup of joe? The honest answer is that nobody knows for sure. The most famous story, about a Navy secretary who banned alcohol on ships, does not fit the dates. The best evidence points to soldiers’ and sailors’ slang from the early 20th century, when coffee was also called java and jamoke, and “joe” was the name for any ordinary guy.

The phrase took off in the same decades when coffee became essential to the US military. So on Veterans Day, here is the story of coffee in World War II, from ration stamps at home to coffee in soldiers’ packs, followed by an evidence check of every cup-of-joe theory.

Key takeaways

• US civilians faced coffee rationing from November 29, 1942, to July 28, 1943: one pound every five weeks for everyone over 15, later cut to one pound every six weeks.
• The shortage was caused by shipping, not harvests: U-boat attacks and the need for cargo space for the war effort.
• American soldiers averaged about 32.5 pounds of coffee a year, roughly four times the rationed civilian amount.
• The phrase “cup of joe” first appears in print in 1930, sixteen years after the Navy’s 1914 alcohol ban, so the Josephus Daniels story is very likely a myth.
• The most likely sources are military slang (java, jamoke) and the use of “joe” for an ordinary person.

In this article

1. Why America rationed coffee
2. How coffee rationing worked
3. Stretching the cup: Roosevelt coffee and substitutes
4. Coffee for soldiers
5. Why is coffee called a cup of joe?
6. FAQ

Why America rationed coffee

Coffee rationing in the United States had nothing to do with a bad harvest. According to the National Park Service, Central and South American producers had large crops when the war began. The problem was getting the beans north. German U-boats were sinking cargo ships in the Atlantic and the Caribbean, and the ships that remained were needed for troops and war materials.

Before the war, Americans were drinking about 20 pounds of coffee per person each year. The government first tried to slow demand by limiting roasters: in April 1942 they could roast only 75% of the previous year’s volume, and in September 1942 that cap dropped to 65%. It was not enough, and the military had priority on what did arrive.

How coffee rationing worked

Coffee rationing was run by the Office of Price Administration (OPA). Sales were halted for a week beforehand so people could not hoard, and rationing started on November 29, 1942. Coffee was bought with stamps from Ration Book One, the book that was first issued for sugar.

A stamp did not guarantee coffee. Some grocers took names and called customers when stock came in, and some restaurants limited diners to one cup. People who did not drink coffee shared or sold their stamps, which was technically illegal. Rationing on coffee ended after about eight months, while sugar stayed rationed until 1947.

Stretching the cup: Roosevelt coffee and substitutes

With a pound having to last five or six weeks, households got creative. The NPS describes several tricks people used:

• Weaker cups. Using a little less coffee so that four cups’ worth could serve five.
• Roosevelt coffee. Running water through grounds that had already been used. The nickname was a jab at the president.
• Chicory. A 1942 Life article suggested adding half an ounce of chicory per pound to stretch coffee by about 30%.
• Substitutes. Roasted grains such as barley, and the grain drink Postum, which was the best-known coffee alternative in the US.

If you have ever reused grounds, you know the result: a thin, bitter cup. Fresh coffee was suddenly a luxury.

Coffee for soldiers

The coffee that did cross the ocean went largely to the military. History.com reports that American soldiers averaged about 32.5 pounds of coffee per person per year during the war, while rationed civilians got roughly 8.5 pounds. Coffee was included in the C-ration packs issued to troops.

Instant coffee was the practical choice in the field: light, compact and ready with hot water. Nestlé launched Nescafé in 1938, and by 1941 it was part of the emergency rations of departing US soldiers. Instant coffee has its own fascinating history, which we will cover in a separate article; for this story, what matters is that millions of servicemen came home used to drinking coffee every day, wherever they were.

That habit helped shape postwar America. US per capita coffee consumption had roughly doubled since 1900, reaching about 19.8 pounds in 1946, and coffee became fixed in the rhythm of factory and office life.

Why is coffee called a cup of joe?

Here is where history gets fuzzy. Etymologists have looked for the source of “joe” for decades. Below are the main theories, with the evidence for each.

Theory 1: Josephus Daniels and the dry Navy

The story: Josephus Daniels, Secretary of the Navy under Woodrow Wilson, banned alcohol on US Navy ships. Angry sailors were left with coffee as the strongest drink on board and started calling it a “cup of Josephus Daniels,” shortened to a cup of joe.

The evidence: Daniels’ General Order 99 was issued on June 1, 1914. But as language writer Michael Quinion points out, the phrase “cup of joe” does not appear in print until 1930, sixteen years later. A nickname born of sailors’ anger would be expected to show up much sooner. The order also mainly ended officers’ wine messes, since ordinary sailors were already largely barred from drinking on ships. Verdict: very likely a myth.

Theory 2: Java, jamoke and joe

The story: Coffee already had slang names in the early 20th century, especially “java” and “jamoke,” the latter thought to blend java and mocha. “Joe” could be a shortened or altered form.

The evidence: A 1931 military manual lists the three words together as slang for coffee, which shows they were used side by side in military circles at the time. Quinion considers a link to java or jamoke the most probable explanation. Verdict: plausible, with the best supporting evidence.

Theory 3: The ordinary Joe

The story: By the early 20th century, “joe” meant an average man, as in “an ordinary Joe.” Coffee was the average man’s drink, so a cup of joe was simply the common person’s cup.

The evidence: The usage existed at the right time and may well have reinforced the java-jamoke-joe link. There is no direct proof, but it fits. Verdict: plausible as an influence.

Theory 4: GI Joe

Some people assume the phrase came from soldiers called GI Joes in World War II. The dates rule this out: “cup of joe” is attested in 1930, more than a decade before GI Joe became common. Verdict: not the origin, though the war certainly spread the phrase.

Theory comparison

Brew a cup of joe, the easy or the classic way

If you want a nod to the soldiers’ cup, our Instant Coffee gives about 30 servings in a resealable pouch: one rounded teaspoon in 8 oz of hot water and you are done, at home, at work or on the road. For a slow, hearty pot, our Cowboy Blend mixes dark and medium roasted beans for a bold, smooth cup with cocoa, caramel and vanilla tones, and unlike the wartime cup, it arrives roasted 1–5 days before delivery. Browse our Best Selling coffees for more.

Cup of joe FAQ

Why is coffee called a cup of joe?

No one knows for certain. The most likely explanation is that “joe” came from earlier slang words for coffee, java and jamoke, possibly reinforced by “joe” meaning an ordinary person.

Is the Josephus Daniels story true?

Probably not. His Navy alcohol ban dates from 1914, but “cup of joe” is first found in print in 1930.

When was coffee rationed in the US?

From November 29, 1942, to July 28, 1943. Each person over 15 could buy one pound every five weeks, later one pound every six weeks.

What did Americans drink instead of coffee in World War II?

Weaker or reused coffee, coffee stretched with chicory, and substitutes such as roasted grains and Postum.

Sources

1. National Park Service. Coffee Rationing on the World War II Home Front. NPS, 2023.
2. Jessica Pearce Rotondi. Coffee and World War II rations (article). History.com.
3. Michael Quinion. Cup of joe. World Wide Words, 2006.
4. HISTORY.com Editors. Coffee rationing begins (This Day in History, November 29). History.com.

Facts checked in October 2026.

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