In 1899, Daly joined with William Rockefeller, Henry H. Rogers, and Thomas W. Lawson to organize the Amalgamated Copper Mining Company.
Not long after, the company changed its name to Anaconda Copper Mining Company (ACM).
Over the years, Anaconda was owned by assorted larger corporations.
In the 1920s, it had a virtual monopoly over the mines in and around Butte.
Between approximately 1900 and 1917, Butte also had a strong streak of Socialist politics, even electing Mayor Lewis Duncan on the Socialist ticket in 1911, and again in 1913; Duncan was impeached in 1914 for neglecting duties after a bombing in the city's miners' hall in 1914.

It had also established itself as "one of the most solid union cities in America."
After 1905, Butte became a hotbed of Industrial Workers of the World (IWW, or the "Wobblies") organizing.
Rivalry between IWW supporters and the WFM locals culminated in the Butte, Montana labor riots of 1914, and resulted in the loss of union recognition by the mine owners.
After the dissolution of the Miners' Union, the Anaconda Company attempted to inaugurate programs aimed at enticing employees.
However, a number of clashes between laborers, labor organizers, and the Anaconda Company ensued, including the 1917 lynching of IWW executive board officer Frank Little.
In 1920, company mine guards gunned down strikers in the Anaconda Road Massacre.
Seventeen were shot in the back as they tried to flee, and one man died.

Sparked by a tragic accident more than 2,000 feet (600 m) below the ground on June 8, 1917, a fire in the Granite Mountain shaft spewed flames, smoke, and poisonous gas through the labyrinth of tunnels including the connected Speculator Mine.
A rescue effort commenced, but carbon monoxide was contaminating the air supply.
Several men barricaded themselves against bulkheads to save their lives, but many others died in a panic to try to escape.
Rescue workers set up a fan to prevent the fire from spreading.
This worked for a short time, but when the rescuers tried to use water, the water evaporated, creating steam that burned those trying to escape.
Once the fire had been extinguished, recovery of the deceased began; many of the bodies, however, were mutilated beyond recognition, leaving many unidentified.
The disaster claimed a total of 168 lives.
As of 2017, the event remained the largest hard rock mining accident in history.
The Granite Mountain Memorial in Butte commemorates those who died in the accident.

Protests and strikes were initiated after the Speculator Mine disaster, as well as the establishment of the Metal Mine Workers Union; approximately 15,000 workers abandoned their jobs in the wake of the disaster.
Between 1914 and 1920, the U.S. National Guard occupied Butte a total of six times to restore civility.
In 1917, copper production from the Butte mines peaked and steadily declined thereafter.
By WWII, copper production from the ACM's holdings in Chuquicamata, Chile, far exceeded Butte's production.
In 1899, Daly joined with William Rockefeller, Henry H. Rogers, and Thomas W. Lawson to organize the Amalgamated Copper Mining Company. Not long after, the company changed its name to Anaconda Copper Mining Company (ACM). Over the years, Anaconda was owned by assorted larger corporations. In the 1920s, it had a virtual monopoly over the mines in and around Butte. Between approximately 1900 and 1917, Butte also had a strong streak of Socialist politics, even electing Mayor Lewis Duncan on the Socialist ticket in 1911, and again in 1913; Duncan was impeached in 1914 for neglecting duties after a bombing in the city's miners' hall in 1914.
It had also established itself as "one of the most solid union cities in America." After 1905, Butte became a hotbed of Industrial Workers of the World (IWW, or the "Wobblies") organizing. Rivalry between IWW supporters and the WFM locals culminated in the Butte, Montana labor riots of 1914, and resulted in the loss of union recognition by the mine owners. After the dissolution of the Miners' Union, the Anaconda Company attempted to inaugurate programs aimed at enticing employees. However, a number of clashes between laborers, labor organizers, and the Anaconda Company ensued, including the 1917 lynching of IWW executive board officer Frank Little. In 1920, company mine guards gunned down strikers in the Anaconda Road Massacre. Seventeen were shot in the back as they tried to flee, and one man died.
Sparked by a tragic accident more than 2,000 feet (600 m) below the ground on June 8, 1917, a fire in the Granite Mountain shaft spewed flames, smoke, and poisonous gas through the labyrinth of tunnels including the connected Speculator Mine. A rescue effort commenced, but carbon monoxide was contaminating the air supply. Several men barricaded themselves against bulkheads to save their lives, but many others died in a panic to try to escape. Rescue workers set up a fan to prevent the fire from spreading. This worked for a short time, but when the rescuers tried to use water, the water evaporated, creating steam that burned those trying to escape. Once the fire had been extinguished, recovery of the deceased began; many of the bodies, however, were mutilated beyond recognition, leaving many unidentified. The disaster claimed a total of 168 lives. As of 2017, the event remained the largest hard rock mining accident in history. The Granite Mountain Memorial in Butte commemorates those who died in the accident.
Protests and strikes were initiated after the Speculator Mine disaster, as well as the establishment of the Metal Mine Workers Union; approximately 15,000 workers abandoned their jobs in the wake of the disaster. Between 1914 and 1920, the U.S. National Guard occupied Butte a total of six times to restore civility. In 1917, copper production from the Butte mines peaked and steadily declined thereafter. By WWII, copper production from the ACM's holdings in Chuquicamata, Chile, far exceeded Butte's production.
Butte, Montana