One myth is that whenever the Allied western democracies occupied Axis territory, they immediately overturned the regimes they found in place there and flung open the gates of the prisons and concentration camps to liberate the inmates. Not in North Africa, they didn't.
After Operation Torch (the Allied invasion of North Africa) in November 1942, the US left the Vichy French administration there intact because of the ceasefire deal that Robert Murphy (Eisenhower's adviser on political affairs) struck with Admiral Franois Darlan. It meant strict non-interference by Americans in local affairs. So GIs in Algiers stood by, watched and did nothing as Vichy policemen rounded up the Resistance fighters who, on the eve of the Allied landings, had risked their own lives to save American ones. Many of the 377 fighters were later dragged off to punishment camps in the Sahara.
Meanwhile in Morocco there were there were fascist pogroms in Casablanca (just moments after the first parade of American troops had passed by the city's Jewish quarter) and in Rabat and Sale, and new anti-Jewish measures were put in place in Meknes and Fez by the US-endorsed regime. Jews and other detainees were still rotting in slave camps in the Sahara as late as August 1943, ten months after the Allied "liberation", because the American troops who garrisoned the country didn't lift a finger to free them. Instead, it was up to de Gaulle's French National Liberation Committee to finally free Vichy detainees shortly after it took control.
I've heard similar events happened in Greece in 1944-5. ---