War Democrat (constitutionalist) de facto President Andrew Johnson (a resident if the confederate State of Tennessee) signs the Garfield Act, greatly improving interstate commerce by mandating a uniform railroad track gauge throughout the compulsory Union.
[restored 4/24/2022]
Subsequent Events:
Authority:
Article I, Section 8 [Clause] 3
ccc-2point0.com/constitution-for-the-united-states
References:
Garfield Act, 14 Public Statutes at Large 66 (1866).