Following a turbulent era of conflict and major battles, a temporary peace settled over the region. For three full years, the neighboring kingdoms laid down their weapons, enjoying a rare period of quiet and stability [מצודת דוד, ביאור שטיינזלץ]. This extended ceasefire was not an accident of history. Rather, it was a direct result of King Ahab humbling himself before God. The primary approach among commentators is that God paused the impending wars and suspended the harsh judgments hanging over the king due to his sincere repentance.
Previously, Ahab had spared the life of the Aramean king, Ben-Hadad, allowing him to return home safely. Because of this action, a divine decree was issued stating that Ahab would forfeit his own life in place of the enemy king. Yet, because Ahab later showed deep remorse and submission, God delayed this death sentence for exactly three years. Only at the end of this grace period did Ahab finally meet his end in battle at Ramoth-Gilead [רלב״ג, אברבנאל]. Had he not humbled himself, the fatal punishment would have struck much earlier, and he would have died in the vineyard of Naboth [אברבנאל].
The specific three-year duration of this peace was carefully measured. It was granted to the king as a direct reward for three distinct acts of humility he performed: tearing his garments, dressing in sackcloth, and fasting [חומת אנך]. The fallout from releasing the Aramean king also went beyond Ahab's personal fate, as a collective punishment was decreed upon the entire nation. However, just as the king's personal doom was postponed, the national disaster was delayed even further into the future, waiting to unfold during the later days of Hazael [רלב״ג, אברבנאל].