Did Michael Corleone get revenge for Apollonia?

Inquiring minds want to know, did Michael Corleone successfully avenge the death of his beloved Apollonia? The loss of Apollonia sent shockwaves through the Corleone family, leaving Michael deeply scarred and seeking justice. Did he manage to track down those responsible and bring them to their knees, or did the shadows of the mob world swallow up his quest for vengeance? The answer to this question may reveal the depths of Michael's resolve and the lengths he was willing to go to protect his loved ones.