Company Government National Guard Events Locations Commemorations Primero is a ghost town in Las Animas County, Colorado, United States.

[5] The town eventually came to contain 175 total buildings, including one Catholic and one Protestant church, a high school, and other amenities.

[6] The closing of the steel works had an adverse effect on the demand for coal from the Primero mine, playing a role in the 1921 labor dispute between CF&I miners and the Company.

[11] In September 1913, a strike was called by the independent United Mine Workers of America union against CF&I.

Following the strike, CF&I–helmed by John D. Rockefeller Jr. and under the advisory of future Prime Minister of Canada William Lyon Mackenzie King–implemented a series of reforms intended to promote support for the Company.

[13] During World War I, at least 48 men from Primero joined the United States military.