to disarm the erstwhile partisans, impose the authority of their own police and damp down popular demands for harsh penalties and collective punishment. The disarming of the resisters proved surprisingly uncontentious in western and central Europe at least. A blind eye was turned to murders and other crimes already committed in the frenzied liberation months: the provisional government of Belgium issued an amnesty for all offences committed by and in the name of the Resistance for a period of 41 days following the official date of the country’s liberation. But it was tacitly understood by all that newly re-constituted institutions of government must take upon themselves the task of punishing the guilty. Here the problems began. What was a ‘collaborator’? With whom had they collaborated and to what end? Beyond straightforward cases of murder or theft, of what were ‘collaborators’ guilty? Someone had to pay for the suffering of the nation, but how was that suffering to be defined and who could be assigned responsibility for it? The shape of these conundrums varied from country to country but the general dilemma was a common one: there was no precedent for the European experience of the preceding six years. In the first place, any law addressing the actions of collaborators with the Germans would necessarily be retroactive—before 1939 the crime of ‘collaboration with the occupier’ was unknown. There had been previous wars in which occupying armies sought and obtained cooperation and assistance from the people whose land they had overrun, but except in very particular instances—like that of the Flemish nationalists in German-occupied Belgium during 1914-18—this was regarded not as an invitation to crime but simply as part of the collateral damage of war. As noted, the only sense in which the crime of collaboration could be said to fall under existing law was when it amounted to treason. To take a representative instance, many collaborators in France—whatever the details of their behaviour—were brought to trial and convicted under Article 75 of the 1939 Penal Code, for ‘intelligence with the enemy’. But men and women brought before French courts had often worked not for the Nazis but rather with the regime of Vichy, led and administered by Frenchmen and ostensibly the legitimate heir to the pre-war French state. Here, as in Slovakia, Croatia, the Protectorate of Bohemia, Mussolini’s Social Republic at Salò, Marshal Ion Antonescu’s Romania and in wartime Hungary, collaborators could and did claim in their defence that they had only ever worked for or with the authorities of their own state. In the case of senior police or government officials who were palpably guilty of serving Nazi interests via the puppet regimes that employed them, this defence was at best disingenuous. But lesser figures, not to speak of the many thousands charged with accepting employment in these regimes or in agencies or businesses that worked with them, could point to a genuine confusion. Was it right, for example, to charge someone with membership after May 1940 of a political party that had been legally represented in a pre-war parliament but had gone on to collaborate with the Germans during the occupation? The French, Belgian and Norwegian governments-in-exile had tried to anticipate these dilemmas by issuing wartime decrees warning of harsh post-war retribution. But these were intended to deter people from cooperating with the Nazis; they did not address the broader questions of jurisprudence and fairness. Above all, they could not resolve in anticipation the problem of weighing individual against collective responsibility. The balance of political advantage in 1944-45 lay in assigning blanket responsibility for war crimes and crimes of collaboration to predetermined categories of people: members of certain political parties, military organizations and government agencies. But such a procedure would still pass over