What if war broke out tomorrow? Tanks and aircraft wouldn’t help

Many imagine Day X or aggression against Lithuania as a moment when the skies are darkened by flying rockets and tanks and other armoured vehicles roll in from Kaliningrad, Belarus and perhaps Daugavpils. However, prior to this… prior to it all, there must be a “period of tensions” when the enemy, similarly to what occurred by Ukraine’s borders recently, would gather its forces.