All of this was on display last month, when Iran launched a barrage of missiles and drones at Israel. No lives were lost—the result of not only Israel’s capable defenses but also the contributions of U.S. and allied forces. The attack showed that America’s continued presence in the region is crucial to dissuade further aggression. But our current policy isn’t responsive to this reality. U.S. military capabilities in the Middle East have steadily declined, emboldening Iran, whose leverage strengthens as international support for Israel wanes. Moreover, America’s clear desire to draw down in the region has undermined our relationships with allies.

Recent history demonstrates that a strong U.S. posture in the Middle East deters Iran. As the leader of U.S. Central Command, I had direct operational responsibility for the strike that killed Qassem Soleimani, the ruthless general responsible for the deaths of hundreds of U.S. service members. Iran had begun to doubt America’s will, which the strike on Soleimani then proved. The attack, in early 2020, forced Iran’s leaders to recalculate their months-long escalation against U.S. forces. Ultimately, I believe, it saved many lives.

The situation in Iran has changed, but the Soleimani strike offers a lesson that is going unheeded. Iran may seem unpredictable at times, but it respects American strength and responds to deterrence.