And when you are done looking at this site for the Scots input on football world-wide, here are two more.
For those who literally want to trace on the ground the local development of Scots and Scottish football in our own and other countries there is the newly available and ever-expanding site of:
The Scots Football Historians' Group
And on Scottish sports history in general but inevitably including fitba', see Andy Mitchell's inestimable:
North American Trails,
Football, soccer, came to the Americas certainly as early at the late 1870s as David Forsyth, probably just Perthshire by birth, introduced it to the High School in Berlin by Toronto in Ontario, Canada. But with Berlin's own town team, Rangers, emerging only in 1884, the continent's first formal club, ONT, based on the mill opened by the cotton-thread-makers, Clarks of Paisley, would be founded in November 1883 in Kearny, New Jersey, with the USA's first trophy, the original American Cup, played for the following year by local teams and won by it, as would also be the case for the two following seasons.
And it would then be the American Cup, which would be the main vehicle for the game to expand its again formal reach.
Whilst its first playings would be confined to New Jersey and New York, by 1887 teams from Connecticut, Rhode Island and Massachusetts would join, then briefly one from Vermont and finally in 1897 from Pennsylvania, in the form of Philadelphia Manz. But meanwhile there was an outlier. St. Louis in Missouri had seen the arrival of the game by 1881, its first iteration in the Mid-West with Chicago and Minneapolis following on by the end of the decade and ten and twenty years before implantation first in California, then the North-West USA and finally in Western Canada.