According to Hodges, in the European countries of NATO it is necessary to abandon additional coordination on the movement of NATO military equipment and the NATO contingent across borders.
Allied equipment and troops should move across borders as in normal migration traffic.
This option is called "military Schengen."
The idea itself is that American troops, for example, be transferred from Germany to the south of Europe through the territories of the Czech Republic, Slovakia or Hungary, even without coordination with the governments of these countries. Or with a formal agreement. If the governments of transit countries suddenly come out against them, they will be presented with the NATO treaty and report a violation with all the consequences for them.
According to the American general, this is an indicator of "alliance."