Having someone blockade your shipping with Warships to stop you from trading Directly with Europe will have that effect on your commerce.
The evidence that this was a money war is all about you, and you just don't want to see it.
But that blockade totally puts the lie to your ludicrous claims (i.e., post #153) that "The South paid the bulk of the revenues, between 72% and 83%."
In fact, when the South was removed from the US revenue stream, "Southern exports" fell only 70%, 30% remained and other exports increased 50% leaving a net export reduction in 1861 of only 30% despite all allegedly "Southern products" being gone!
See my post #488 on this.
DiogenesLamp: "The evidence that this was a money war is all about you, and you just don't want to see it."
Nobody denies that every war includes economic factors.
But free people don't go to war just over economics.
There are always more important factors, in 1861 those included preserving the Union, Federal properties and the status of slavery.
As you well know but like to pretend otherwise.