At the beginning it was a branch of Prosvita, and in 1907 it was renamed into National Dairy Union Maslosojuz.
By 1914, it united around 100 smaller dairy cooperations, which handled around 7.5 mln liters of milk from Ukrainian farmers in eastern Galicia.
The founders of Maslosojuz were: Yevhen Olesnytsky, Ivan Bachynsky, Ostap Nyzhankivsky, and Lev Horalevych.
[1] After World War I, Maslosojuz was recreated in 1924, within boundaries of newly created Second Polish Republic.
As leading Polish daily Ilustrowany Kurier Codzienny wrote on 15 January 1937: "The products of Maslosojuz are well known across the nation, and the corporation itself controls all dairy markets of former Eastern Galicia".