In this case the NATO staging area appears to have been some guy’s barn.
Doesn’t matter to a DC warmonger with his bloodlust up looking to accomplish regime change in Moscow or his hinterland neocon stooges. Any attack is justification for Article 5.
I just listened to a breathless female Times Radio commentator calling this the trigger for an Article 5 (attack against one is an attack against all) NATO response. You’ve got to wonder if she just graduated from high school.