Overall it meets the primary directive of this administration, which is to weaken the United States as a superpower and make way for Russia.

The US currently has 2 BCTs "fully" in Germany. The 2nd Cav Regiment (a Stryker unit.. so infantry mounted on 8x8 APCs) and an Armoured BCT on 9 month rotation (so tanks and IFVs).

There have been a bunch of studies indicating that the rotational ABCT costs more than even a truly forward deployed ABCT. My bet is that it's the ABCT that is going to get withdrawn. It's both the flashier unit, and likely has the highest impact on freeing up money. This also lines up with the withdrawal timelines... since the unit is rotational, they just need to wait for the end of rotation, and just... not send another. Much less disruption.

While the timing was obviously conjunction with current events, this draw down was likely to happen at some point in this term, even in absence of Iran things. Trump literally tried to do this at the end of his last term.