Rommel's second offensive took place in May and June 1942. Tobruk was taken in an outflanking attack on 21 June 1942, capturing the largest number of British Commonwealth troops after the fall of Singapore earlier in the year, where over 80,000 were captured. Rommel was promoted to Generalfeldmarschall, shortly thereafter and was the youngest in the Wehrmacht Heer to achieve this rank. The following units were deployed in Tobruk on 20 June 1942, and most of them were captured by the Axis forces: