God responds to Gideon's second request by completely overturning the natural order. In a direct and undeniable break from the laws of nature, the fleece remains entirely dry while the surrounding ground is soaked. Unlike the first sign, which was not entirely detached from the natural world, this second event is an open display of divine intervention. Yet, this miracle is more than just proof of His power; it carries a hidden message about the upcoming war against Midian.
The two signs requested by Gideon actually complement each other, outlining the two distinct phases of the future victory. The initial sign symbolized the first stage of the conflict, where Gideon would strike the Midianite camp using his own direct forces. The second sign, however, points to the continuation of the battle. The dry fleece signifies that Gideon's isolated strength will not be enough on its own to achieve the ultimate victory. Conversely, the moisture covering the vast expanse of the ground represents the rest of the nation, who will step forward to join the campaign and deliver the final, decisive blow against the enemy [מלבי״ם].