who were the people that dovid instructed them to attack at bottom of daf 3b? I haven't found any references in nach or medrash to date and the gemorra in sanhedrin 16a doesn't povide any more clues.
aaron hersh, london england
My guess is that it was Aram Naharayim and Aram Tzovah (or Surya), the nations that were considered to be "Kibush Yachid" of King David (Gitin 8a and elsewhere). The description fits according to both Rashi and Tosfos' explanation of Kibush Yachid (ibid.), I believe.
-Mordecai Kornfeld