Nyora kupfuurira kweiyi ndima - Fleszarowa akagadzwa muna 1935 kuti ashande seSeneta neMutungamiri wePoland Republic. Mukati mokutonga kwake, akaisa pfungwa dzake pakuronga zvesayenzi uye kuwedzera kodzero dzevagari vemo. Muna 1937 akanga ari mumwe wevarongi veDemocratic Club yeWarsaw, achishanda semutevedzeri wemutungamiri wayo uye Democratic Alliance Party. Mutemo wake weSeneti wakapera muna 1938 uye mukati meKugara kwePoland
, akabatana neboka revasingadi kupinda muchiuto, achibatanidzwa muHome Army. Achishanda mukugadzira mashoko uye kuparidzira kweHomeland Army, akagovera mepu uye akabudisa mabhuku, achigadzira hofisi yekunyora yezvinyorwa zvepasi pevhu. Akashanda kuvanza vaJudha, uye akatungamira musangano wakavanzika wevachengeti vemaraibhurari, achitungamirira kuedza kuvanza zvinyorwa zveSangano revachengeti vemaraibhurari ePoland. Achitiza guta racho pamberi peWarsaw Uprising muna 1944, Fleszarowa akaenda kuLublin uye akashanda semunhu anosangana nePolish Committee of National Liberation. Muna October 1944, akagadzwa kuva mukuru weDhipatimendi reRaibhurari reBazi Rezvedzidzo.