Fighting over Kobryn and Pruzana tied down the whole Soviet Fourth Army and allowed the Polish Army headquarters to prepare an operational plan for the Battle of the Niemen River .
The whole Soviet Fourth Army removed the threat of the capture of Brest Fortress .
Fighting over Kobryn and Pruzana tied down the whole Soviet Fourth Army , which removed the threat of the capture of Brest Fortress , and allowed the Polish Army headquarters to prepare an operational plan for the Battle of the Niemen River .