The devastation of battle cuts short the natural course of life, replacing the celebration of marriage with profound grief. When young soldiers, including deeply pious men, went out to fight, they were met with total destruction [אבן עזרא, רד״ק, מצודת דוד]. The consuming fire that swept through their ranks was not a literal flame. Rather, it served as a metaphor for the deadly blade of the enemy's sword [אבן עזרא, רד״ק], representing the fierce anger and wrath of God burning against them [רש״י, מצודת דוד]. Because this conflict was an obligatory war—a time when Jewish law requires even a groom to leave his chamber and a bride her canopy to join the national effort—many young men who were just about to be married fell on the battlefield [מלבי״ם].
The loss of these young soldiers created a secondary tragedy on the home front. The young, modest women who remained behind were left without their intended grooms and never reached their wedding day [אבן עזרא, רד״ק, מצודת דוד, שטיינזלץ]. The joy of the wedding canopy is traditionally defined by songs of praise dedicated to the new couple [רש״י, רד״ק, מצודת ציון], specifically highlighting the bride's beauty and grace [מלבי״ם]. With the men gone, these celebrations were completely silenced. A related perspective suggests that the absence of young men eliminated the role of the matchmaker; there was no longer any reason to praise the virtues of these young women in order to persuade prospective husbands [מאירי].
While some Talmudic sages applied this tragedy to the sudden death of Aaron's sons, Nadav and Avihu, the straightforward understanding of the events places them firmly within a broader national disaster. The tragedy serves as a continuation of the sweeping ruin that occurred during the time of the Tabernacle in Shiloh [רש״י].