In April 1945, Captain Jan Kosowicz, nom de guerre(s) “Ciborski”, “Janek”, “Capt. Jan Chmielewski”, who directed the “long-range-intelligence” cell of the AK-DSZ (code-name "WW-72", later “Pralnia II” - Eng. “Laundromat II”) established the “The Protection Unit of the General Staff of the Delegation of the Polish Armed Forces at Home and the 1st Executive Office of the Association WiN” (Pol. Oddział Osłony KG DSZ na Kraj i I ZG Zrzeszenia WiN). Its members wore Polish Communist “People’s” Army uniforms, and carried fictitious identity papers identifying them as members of a special-purpose unit attached directly to the General Staff of the Communist Polish Peoples’ Army, or LWP (Pol. abbr. Ludowe Wojsko Polskie). These counterfeited identity ID’s also attested to the fact that they joined the Communist military forces in Kuibyshev (Rus. Куйбышев), where the secret NKVD (Rus. Народный комиссариат внутренних дел Narodnyy komissariat vnutrennikh del - Soviet secret police) training school was located.

Having fictitious identities of employees of an engine repair and design facility, they were assigned quarters in the building on Karolkowa Street in Warsaw. This unit provided transportation, communications, and personal security for Colonel Jan Rzepecki, nom de guerre “Ożóg”. This unit had about a dozen very well armed men, and had several vehicles at its disposal. Initially, it consisted of members from the “Cerownia” intelligence cell, but in time, Capt. Jan Kosowicz, “Ciborski”, expanded it by bringing-in more trusted individuals.

Above: Stoczek Łukowski, June 1945. The soldiers from the Protection Unit of KG DSZ, meeting with Capt. Wacław Rejmak, nom de guerre “Ostoja” - a Commandant of the OP. They are warning “Dziad”- a UB ‘snitch’ wearing a white hat in the photo. Standing first from the right, and next to “Dziad”, with his back turned, is Platoon Leader Franciszek Kosowicz "Małecki", NN (Pol. abr. Unknown and Unidentified) “Dziad”, Jerzy Waszczuk, "Czernow", Capt. “Ostoja” (wearing a leather coat). On the left, wearing a military uniform, is Second Lt. Jerzy Kuczyński, "Czyński", and two NN men from the OP unit “Ostoja”, who are standing with their backs turned.

Subsequently, Capt. “Ciborski” made a decision to immediately remove Col. Rzepecki from the area surrounded by the Communist KBW (Pol. abbr. Korpus Bezpieczeństwa Wewnętrznego – Internal Security Corps) forces combing through the area. The resistance’s “Legalization” unit issued orders to “Capt. Jan Chmielewski”, and his “Protection Unit”, to search through the buildings where Rzepecki stayed, to arrest him, and to bring him to safety. The operation to secure Rzepecki was conducted by 10-12 individuals. Because of incredible bravado, and imagination displayed by all men of the Protection Unit, Col. Rzepecki was moved out, and was safely transported to Łódź.

Col. Jan Rzepecki was arrested a month and a half later in Łódź, on November 4, 1945 while waiting for a secret meeting. At this time, Jan Kosowicz, “Ciborski” was in a safe house with a driver, awaiting information about the time and place, to pick up Rzepecki. Informed by the courier that the WiN’s Chairman was arrested, he made his way to the building where "Ożóg" was apprehended by Polish secret police. Having no prospect of freeing him there by himself, he followed the column of the UB vehicles carrying Rzepecki to Warsaw. He was able to reach him in prison on Rakowiecka Street, and proposed an operation to free him from UB hands. "Ożóg" refused, discerning that such an operation was unrealistic. Already, at this time, Rzepecki was conducting negotiations with the “Bezpieka” to out the WiN and its members. Under the threat of being compromised, the Protection Unit received orders from Col. Tadeusz Jachimek, “Ninka” to leave the country. It was planned, that the transfer of men to the West would take place in three groups. But, only the first group consisting of 7-men led by Jan Kosowicz “Ciborski”, that left Poland around November 7, 1945, made it through.