American officials expect Israel will retaliate against Iran for its attack earlier this month before November 5, sources tell CNN, a timeline that would thrust the growing volatility in the Middle East squarely into public view within days of the American presidential election.

The officials, who spoke on the condition of anonymity to discuss sensitive diplomacy, said that Israel had agreed to focus its next attack on military targets in Iran, instead of those related to Iran’s oil industry or its uranium enrichment efforts. The pledge was first reported by the Washington Post.

About 100 U.S. troops are expected to deploy to Israel, drawing the U.S. more deeply into the complex war playing out in the Middle East.