The idea that we could resist a force capable of interstellar travel is the stuff of Hollywood not reality. Harry Turtledove created the least ridiculouscscenario when his aliens were slow, very slow, to develop technology beyond what they actually needed. So when they came in 1942, their military tech was barely the level of the Earth of Turtledove’s time, 1990s. But in reality we’d lose in 9 minutes. Just like L Ron Hubbard portrayed.
“in reality we’d lose in 9 minutes”
In reality we would never know we lost—it would happen that fast.