Michniów has been known for patriotic traditions since the January Uprising. In September 1939, many men from Michniów fought in the ranks of the Polish Army. One of them, Józef Dulęba, took part in the Battle of Westerplatte. In the autumn of 1939, the inhabitants of Michniów provided assistance to the partisan units of Major Henryk Dobrzański, pseudonym "Hubal". The first resistance structures also quickly formed in the village. Coming from Michniów Hipolit Krogulec, pseudonym "Albiński" became one of the first organizers of the Union of Retaliation (Z.O.) in the Kielce Province. Over time, the number of the Z.O. cell in Michniów increased to around 10 members, and "Albiński" himself became the deputy commander of Z.O. in the Kielce District of the ZWZ. After the renaming of ZWZ into the Home Army (Armia Krajowa - AK), a secretive platoon formed under the code name "Forge" in Michniów. Władysław Krogulec became its commander, while Franciszek Brzeziński served as his deputy. On the eve of pacification, more than 40 village residents were sworn members of the Home Army. The inhabitants of Michniów also supported partisans from the People's Guard unit of the Kielce region (commander: Ignacy Robb aka "Narbutt"). The village population also provided aid to Soviet prisoners of war who had escaped from the camps.