I'm sure they were aware of the real mission too. Not the mission(s) we were told. To rid Iraq of Saddam, or WMD's, for freedom. So we don't have to fight them here. Because Al Queda will take over if we stop. The mission changed a lot.But the Pentagon must have known Saddam was innocent.
The Pentagon had info from how we gave Saddam WMD for use against the Iranians, from US inspectors who never found any WMD, etc.
So while the low level US military may have believed in what they were doing, the US military still was guilty of fraud and murder.
No one said it was for oil but it was. The Pentagon probably knew it was for oil.
Or for Israel.