Born in the Polish village of Gaj in 1923, Marian Mazgaj was a teenager when Germany invaded his country and launched Poland into the combat of World War II. Too young to join the Polish army, within a few years he became a member of the Sandomierz Flying Commando Unit, a unit which merged with the "Jedrus" Polish underground group. This memoir provides a vivid record of Mazgaj's career in the military. The Sandomierz Flying Commando Unit and the "Jedrus" underground were actively engaged in fighting the Nazi forces in Poland during World War II, and the author provides a first-hand account of the groups' roles in attacking and disarming German military units; destroying the enemy's grain warehouses and receiving air drops of weapons, ammunition, and explosives from the Allies. He also describes the incorporation of his partisan group into the Home Army, whereby he and his comrades became the Fourth Company in the Second Regiment of the Second Division, gaining strength and destroying many more German units.