"Zwi\u0105zek Odwetu (ZO, Polish for Union of Retaliation) was a Polish World War II resistance organization established on April 20, 1940. It was created by Gen. Stefan Rowecki, the head of the Zwi\u0105zek Walki Zbrojnej, as the branch of that organization focused on sabotage and diversion."@en . . . . "Zwi\u0105zek Odwetu (ZO, Polish for Union of Retaliation) was a Polish World War II resistance organization established on April 20, 1940. It was created by Gen. Stefan Rowecki, the head of the Zwi\u0105zek Walki Zbrojnej, as the branch of that organization focused on sabotage and diversion."@en . . "Union of Retaliation"@en . . . . .