He was a cautious general with a great respect for the German war machine. Some American planners thought that Brooke's participation in the campaigns of the First World War and in the two evacuations from France in the Second World War made him lack the aggression they believed necessary for victory. According to Max Hastings, Brooke's reputation as a strategist was "significantly damaged" by his remarks at the Trident Conference in Washington in May 1943, where he claimed that no major operations on the continent would be possible until 1945 or 1946. His diary says that he wanted "operations in the Mediterranean to force a dispersal of German forces, help Russia, and thus eventually produce a situation where cross Channel operations are possible" but that Churchill "entirely repudiated" (or half repudiated) the paper we (the CCOS) had agreed on; Harry Hopkins got him to withdraw his proposed amendments but that Churchill had aroused suspicions with his talk of "ventures in the Balkans."