Historian Christoph Mick states there was no systematic violence nor massacres of ethnic Poles by Ukrainians during the course of this war but that both sides blamed each other for bloodshed. When Ukrainian forces first captured Lviv they refused to take hostages, tolerated Polish recruitment centers and were even prepared to enter negotiations with the Polish side, but were met with armed resistance. Polish historians, however, describe numerous examples during which Ukrainian troops used terror to subdue Poles into compliance. Ukrainian authorities tried to intimidate Polish population in Lviv by sending soldiers and armed trucks into the streets and dispersed crowds that could turn to Polish demonstrations. Ukrainian soldiers patrolled the streets with firearms and machine guns aimed at pedestrians; Polish sources claim that the Ukrainians shot bystanders who were looking at them from windows or building entrances. while Ukrainians claimed Poles were shooting at their soldiers from windows and behind gateways. Polish fighters also often dressed in civilian clothing when shooting at Ukrainian soldiers. According to historian Christoph Mick, both Poles and Ukrainians engaged in a propaganda war with each side accusing the other of war crimes and brutality. During fights over Lviv, Polish nurses who assisted wounded soldiers were said to have been captured by Ukrainian forces and tortured before being executed, while Ukrainians sources claimed that Polish soldiers shot Ukrainian medical patrols and accused Poles of rape and bloodlust.