If they send out a fleet of rocket ships armed with atomic weapons like those or perhaps even larger ones, it would be difficult to hold out against them.
7 seconds sound clip from the Radar Men from the Moon - Flight of Destruction (S1E4) movie soundboard.
You can hear this line at 00:02:33.697 in the Blu-ray version of the movie.
Quote context
[...]
- What do you think their chances are of succeeding?
- You've seen what the ray guns have already done here.
- Perhaps our best move would be to attempt an attack on the Moon.
- But we just can't sit here and wait to be attacked.
- Yes, that's certainly the first thing to do.
[...]