What it says on the tin.
In OTL, the United States and the United Kingdom, warmed up to each other fairly quickly after the Revolution (despite some hiccups along the way, including the War of 1812, and the half-assed attempts by some members of the British government to recognize the CSA during the Civil War), while Franco-American relations were fairly touch and go (until the fall of Napoleon III's government post Franco-Prussian war).
The challenge, then, is to use any POD/series of POD's to "flip" America's relationship with France and Britain. By that I mean France and America have, by the mid-20th century, a similar relationship/level of cooperation, while America and the UK have a cordial, even friendly, relationship, but one that is oftentimes fraught with disagreement.
In OTL, the United States and the United Kingdom, warmed up to each other fairly quickly after the Revolution (despite some hiccups along the way, including the War of 1812, and the half-assed attempts by some members of the British government to recognize the CSA during the Civil War), while Franco-American relations were fairly touch and go (until the fall of Napoleon III's government post Franco-Prussian war).
The challenge, then, is to use any POD/series of POD's to "flip" America's relationship with France and Britain. By that I mean France and America have, by the mid-20th century, a similar relationship/level of cooperation, while America and the UK have a cordial, even friendly, relationship, but one that is oftentimes fraught with disagreement.