The Borderlands' Defence Committee ( also known as , KOK) was established in late November 1918 in Warsaw. It emerged from the so-called Lithuanian Committee, established in the same city in early 1917. The committee's office was in the .
It provided political patronage for the emerging volunteer military self-defense units of the pro-Polish Self-Defence of Lithuania and Belarus. The incorporation of the division into the Polish Army was achieved on November 26, 1918, when Chief of State Józef Pià Âsudski agreed to the creation of such a division.
Together with the Polish National Council of White Ruthenia and Livonia, the Borderlands' Defence Committee sent a thank-you address to Pià Âsudski for the Polish victory during the Vilnius offensive in April 1919.
Wà Âadysà Âaw Raczkiewicz was the committee's chairman.