The war has killed more than 1,000 people in Iran, more than 70 in Lebanon and around a dozen in Israel, according to officials in those countries. It has disrupted the supply of the world’s oil and gas, snarled international shipping and stranded hundreds of thousands of travelers in the Middle East.

The war powers resolution gave lawmakers an opportunity to demand congressional approval before any further attacks are carried out. The vote forced them to take a stand on a war shaping the fate of U.S. military members, countless other lives and the future of the region.

Four days into a war that President Donald Trump suggested would last several weeks but perhaps longer, nearly 800 people have been killed in Iran, including some Trump said he had considered as possible future leaders of the country.

The war in the Middle East spiraled further Monday as Israel and the U.S. pounded Iran. Tehran and its allies hit back against Israel and targets critical to the world’s production of oil and natural gas.

Oil prices climbed, and stock markets slipped Monday as investors and households got the first chance to see what the war in the Middle East could mean for their finances.

Washington has a long, complicated past when it comes to regime change. There was Vietnam in the 1960s and 70s, and Panama in 1989. There was Nicaragua in the 1980s, Iraq and Afghanistan in the years after 9/11, and Venezuela just weeks ago.

Iranian authorities say more than 200 people have been killed since the start of the strikes that killed Ayatollah Ali Khamenei and other senior leaders. The U.S. military said three service members have been killed, the first known American casualties from the conflict.

Iran retaliated by firing missiles and drones toward Israel and U.S. military bases in the region, and exchanges of fire continued into the night.

While presidents have the authority as the commander in chief to conduct certain strategic military operations on their own, the Constitution vests Congress with the power to wage war.

The remarks by two Iranian officials come as America has assembled its biggest deployment of aircraft and warships to the Middle East in decades. The buildup is part of President Donald Trump’s efforts to get a deal to constrain Iran’s nuclear program while the country struggles at home following nationwide protests.

On Day 1 of a ceasefire agreement between Iran and Israel that has already been violated, President Donald Trump vented his frustration with both countries. Trump commented, “We basically have two countries that have been fighting so long and so hard that they don’t know what the f--- they’re doing.”

The assessment, which has not been previously reported, was produced by the Defense Intelligence Agency, the Pentagon’s intelligence arm. It is based on a battle damage assessment conducted by U.S. Central Command in the aftermath of the U.S. strikes, one of the sources said.

The Trump administration on Tuesday postponed classified briefings for Senate and House members as lawmakers look for more answers about President Donald Trump’s directed strikes on Iranian nuclear facilities over the weekend and his announcement on Monday that the two countries had reached a ceasefire agreement.

Iran said the volley matched the number of bombs dropped by the United States on Iranian nuclear sites over the weekend. Iran also said it targeted the base because it was outside of populated areas.

Iran launched at least 180 missiles into Israel on Tuesday, the latest in a series of escalating attacks in a yearslong conflict between Israel and Iran and its Arab allies that threatens to push the Middle East closer toward a regionwide war.

That estimate is considerably lower than the toll reported by Human Rights Activists in Iran, a U.S.-based group that has been closely tracking the protests since they erupted after the Sept. 16 death of a young woman being held by the country’s morality police.