Bush 1 should have commanded that the entire column of retreating IRCG forces decimated in the desert and Tehran leveled.. It would have saved a lot of lives since then.
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Are you sure you have your history sorted out?
Bush1 didn't even go after Baghdad (which we could have conquered easily).
Where did you get the notion that we were ready to attack Iran in the Spring of 1991???
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However, I agree with your basic premise. I felt we should have taken out the Iranian Mullah regime as soon as we got our 52 hostages back. Doing so early in Reagan's first term would have short-stopped much of the terrorism we've experienced since.
Who knows -- we may still have the opportunity to do so...