Well, we can start at the beginning. . .
First Lithuanian-Muscovite War: Russian aggression, in pursuit of Ivan III's self-proclaimed claim to the entire territory of the fallen Byzantine Empire.
Second Lithuanian-Muscovite War: Russian aggression, Ivan III again.
Third Lithuanian-Muscovite War: Russian aggression yet again, Ivan III's son tries to conquer Poland after his illegitimate bid for the Polish throne was rejected.
Russian aggression against Poland literally predates Russia as we know it; the "Russians" at this point were merely the Grand Duchy of Moscow, and had no actual legitimate claim to any of Kievan Rus in the first place since they were not any sort of legitimate successor government to the Varangians of the Rurik Dynasty.