This recent case discusses Commissioner v. Stidger (U.S. 1967).
Charles R. Khoury Jr.,
Federal Income Tax - "Tax Home" doctrine affirmed; taxpayer on overseas tour of duty not allowed to deduct cost of meals as an "Away From Home" travel expense. Commissioner v. Stidger (U.S. 1967).,
San Diego L. Rev.
Available at: https://digital.sandiego.edu/sdlr/vol5/iss1/14