Since March 1919, Polish intelligence was aware that the Soviets had prepared for a new offensive and the Polish High Command decided to launch their own offensive before their opponents.
Încă din martie 1919, contrainformațiile poloneze erau la current cu preparativele de ofensivă ale sovieticilor, iar Înaltul comandament polonez a hotărât să lanseze propria ofensivă înaintea adeversarilor.