The key is that the US Iran conflict is being fought in Iraq whose govt allows Iranian military operations against the US but disapproves of US operations and wants the US troops to leave. There is no legal or logistical basis for the US to continue to occupy bases in Iraq, with Iran ready to fire missiles against stationary bases and the local govt wanting the US to leave.
Out of iraq, US military will be pressed to maintain its occupation of Syria's oil fields and will have to concede broader Iran and Russian and Chinese influence in the Middle East.
Out of iraq, US military will be pressed to maintain its occupation of Syria's oil fields and will have to concede broader Iran and Russian and Chinese influence in the Middle East.