Union Makes Strength is one of the "POR" (Perkoempoelan Olah Raga; sports associations) in DKI Jakarta.

This club was established on 15 December 1905, under the name Tiong Hoa Oen Tong Hwee (THOTH).

Meanwhile, a football club from Chinese ethnicity, namely Tiong Hoa Hwee Koan (Pa Hua) FC, was founded on 20 February 1912.

Exactly on 2 August 1914 by its founders, Oey Keng Seng and Louw Hap Ie, then the name Tiong Hoa Hwee Koan was changed to Union Makes Strength (UMS).

In 1913, UMS had its own field by renting a garden belonging to a native named Haji Manaf at a rate of 6 guilders a month.