his battle is recognized as having been tactically indecisive due to neither side having gained any significant ground, it is most notably discussed as a battle that yielded little change in the balance of strength between the Russians and the French. By most accounts, this was a successful Russo-Prussian rearguard action. Napoleon never realized he faced the entire army at Heilsberg. Murat and Soult attacked prematurely and at the strongest point in the Russo-Prussian line. The Russians had built extensive fortifications on the right bank of the Alle river, but only a few minor redoubts on the left bank, yet the French advanced over the river to give battle, squandering their advantages and incurring casualties