Retired military officers are urging against a war with Iran

Iran just conducted a massive rapid deployment exercise that consisted of 12,000 coordinated troops – the Islamic Republic was saying to the world that any attackers would face a "crushing blow." Over two days, Iran's regular military forces used ground troops, fighter planes, armored vehicles, and drones to practice its methods of repelling invaders over 190 square miles.

The exercises are aimed at Israel and the United States, both of which Iran considers a regional menace. Back in the United States, regardless of Iranian training exercises, a growing portion of the military community is urging against a war with Iran, and the effort is being led by retired U.S. Army Maj. Gen. Paul Eaton.

Eaton is best known for his command of training Iraqi troops during Operation Iraqi Freedom.

Led by Eaton, a cadre of former General-grade officers wrote an open letter to Congress, urging against provoking a war with the Islamic Republic of Iran. The Iranian military exercises played no role in the letter, which had been in the works for some time. In the letter, Eaton, the other officers, and the non-profit Vet Voice Foundation remind Congress about the costs of the current wars the United States is still engaged in right now.

"A full-scale military conflict with Iran would be a huge and costly undertaking," the letter reads. "It's a lesson we've learned before as a nation, at great cost. The wars in Iraq and Afghanistan have cost us a lot in blood and treasure. We know that war with Iran would require hundreds of thousands of American service members to deploy and could result in even larger numbers of American casualties and injuries―alongside an unknown number of civilian deaths."

While the United States does not have any kind of motive to attack Iran as of this writing, the letter is urging Congress to pass legislation to keep the White House from using military force without direct Congressional approval. The current authorization for the use of military force used by the Trump Administration to conduct military operations in Afghanistan and elsewhere is the same one used by his predecessors Obama and Bush, signed into law by President Bush after the Sep. 11, 2001, attacks on New York and Washington. The new National Defense Authorization Act could bar the use of force in Iran.

Specifically, the letter endorsed a bi-partisan detail in the 2020 NDAA that would prevent "unauthorized" military force in or against Iran, sponsored by Pennsylvania Democrat Rep. Ro Khanna and ardent Trump supporter and Florida Republican Congressman, Rep. Matt Gaetz. There is no current language in the Senate version of the bill. Before going to the President's desk, the NDAA would need to be reconciled and passed by both houses. The letter urged the inclusion of the Iran language in the final bill.

U.S. troops are deployed to hundreds of countries – Iran is not one of them.

The group of military officers believes the interests of the United States are better served by focusing on the confrontations with Russia and China, instead of expanding into another Middle East conflict.

"The idea that we would enter yet another war in the Middle East without a clear national security interest, defined mission, and withdrawal strategy is unacceptable to America's veterans and our allies across the political spectrum," the letter reads.