In an exchange of captured Polish territories in compliance with the terms of the protocol, already on September 17 the Red Army and Wehrmacht held a joint military parade in Brest; occupation of the city was then transferred by Germany to the Soviet troops.[115] In the following battles with the rest of the Second Polish Republic's army, the Soviet Union occupied the territories roughly corresponding to its sphere of interests, as defined in the secret additional protocol to the Molotov–Ribbentrop Pact.