Answer
Peary's triumph came during his 1891-1892 expedition, when he meticulously planned and executed a daring journey to Greenland. In contrast to his previous endeavors, Peary meticulously charted his route, assembled a skilled team of explorers, and stocked up on vital supplies. Equipped with these advantages, he pushed deep into the Greenland ice cap and made significant geographical discoveries, securing his legacy as a pioneering Arctic explorer.