[Billthedrill]

Fair enough, although I would point out that there were blond-haired, Russian-speaking pilots in both Korea and Vietnam. Cuban advisors shooting at Portuguese troops in Angola. I’m just not comfortable with sharp lines of demarcation, that’s all.

[bvw]

And their was an Abraham Lincoln Brigade (Spanish Civil War) and the Lafayette Escadrille in the phase of WWI before the US joined it. And Wilson send an US Army expeditionary force of 13,000 to Northern Russia during the Bolshevick Revolution that operated there from late summer 1918 through spring of 1920, although it saw little war action. It doesn't look he got Congress to authorize it either.

There also were the post-civil war American Freebooters who operated in the Far East and south of the continental US Border for various national factions.