In 1870 North Adams was "one of the busiest little towns, humming and smoking with various industry," wrote Harper's magazine. The population of the northern Berkshire County town had almost doubled in the 1860s. In 1868, which was considered a relatively slow year, North Adams's 38 mills and factories produced $7,000,000 of goods. Low wages and increased mechanization, however, were causing unrest among the workers.

Calvin Sampson founded one of North Adams's most successful shoe factories in 1858. By 1870 it had grown into a thriving business. The first workers were mostly immigrants from Ireland and Canada; the addition of returning Civil War soldiers ensured that Sampson had a ready supply of cheap labor. He paid his 150 workers a total of $5,000 — about $33 each — to turn out 300,000 pairs of shoes a year. As shoemaking became increasingly mechanized, there was less and less need for skilled workers. In an effort to protect their jobs, in 1867 shoemakers formed the Knights of St. Crispin. For a short time, it was the largest and strongest union in the country; by 1870 there were almost 50,000 Crispin members.

In April 1870, Sampson's employees, all Crispins, struck for higher wages and against the ten-hour day. He promptly fired them. A few days later, he brought in replacements from a nearby town, but union members persuaded the men not to stay. That same day, the superintendent of Sampson's factory left for San Francisco with instructions to return with 75 Chinese laborers.

Shortly after his arrival in California, Sampson's representative signed a contract to employ "75 steady, active, and intelligent Chinamen" for three years. The men were between 16 and 22 years old; they would work 11-hour days (10 ½ in the fall and winter) for 90 cents a day — less than half of the strikers' wages — plus housing and heat, with a small increase in the second and third years. Sampson paid their travel expenses, including return fare to California if they worked three years or more. He was the first American manufacturer to transport Chinese workers east of the Rockies to break a strike.

In an article about the events in North Adams, a Boston newspaper commented that the "most powerful enemy has now been discovered" for the growing "influence of trade unions." Indeed, only ten days after the Chinese arrived in North Adams, workers on strike against other shoe factories voted to return to work with a 10 percent cut in pay. In the months that followed, manufacturers used the threat of Chinese contract laborers both to prevent strikes and end them.

The union went on the offensive, holding mass meetings in dozens of cities. The one in North Adams drew between 3,000 and 4,000 people. Some labor leaders, journalists, and elected officials directed their anger at the men who imported Chinese immigrants under labor contracts. Many others simply attacked the Chinese as "semi-barbarous strangers to our civilization."

In less than three months, the Chinese men in Sampson's factory were producing more and better shoes than the workers they had replaced. In the first year alone, Sampson realized $40,000 in savings. In 1871 he hired an additional 50. The people of North Adams generally resented and ostracized the Chinese, who understandably kept to themselves. Only a few stayed on when their contracts ended.

Sampson's unprecedented action helped put the question of Chinese immigration and contracted Chinese workers on the national agenda. In 1876 both major political parties included Chinese exclusion in their campaign platforms; in 1882 Congress passed the Chinese Exclusion Act. For the first time in U.S. history, it was illegal for a specific group of people to enter the country. (The last barriers to Chinese immigration were not removed until 1964.)

Before the events of June 1870, Massachusetts residents had little reason to think about Chinese immigration. During the late eighteenth and early nineteenth century, when trade between coastal Massachusetts and China flourished, an occasional Chinese sailor could be seen on the streets of Salem or Boston. Beginning in the 1840s, American missionaries arranged for a small number of young Chinese to study in New England, but it is unlikely that anyone in North Adams had ever laid eyes on an Asian before the Chinese workers stepped off the train. The 1870 federal census counted 63,199 Chinese living in the continental United States; 99.4 percent of them were found in the western states or territories.

North Adams never developed a Chinese community of any size, but within a few years, there were a handful of Chinese immigrants living in Worcester and other Massachusetts cities. Only Boston attracted enough Chinese to create a real community. For nearly half a century, the community was made up almost entirely of men, most of whom considered their stay in America to be temporary. In 1903 there were 800 men but only 18 women residing in Boston's Chinatown. As late as 1940, only 70 of the 1,920 residents of the neighborhood were women. After World War II, legal and political changes made it easier for Chinese women to come to the U.S., and the number of women and children in Chinatown increased dramatically.