The inspiring speech is a staple of heroic legend. So it's appropriate to use it on great occasions.

Just make sure that whoever's giving the speech has a high Charisma score.

Transcript

Rebel Trooper: Transports leaving in eleven minutes! Pull out!
Major Derlin, 2nd Lord Clabburn: Hold your ground, hold your ground!
Major Derlin, 2nd Lord Clabburn: A day may come when the courage of men and women... and droids... and shapeshifters... and other Rebels fails, when we forsake this land and break all bonds of fellowship, but it is not this day.
Major Derlin, 2nd Lord Clabburn: An hour of... giant mechatronic camels and shattered guns, when the age of the Rebellion comes crashing down! But it is not this day! This day we fight!
Major Derlin, 2nd Lord Clabburn: By all that you hold dear on this good Hoth, I bid you stand, Rebels of the Clabburn Range!
{beat}
Rebel Trooper: Transports leaving in nine minutes! Pull out!
[SFX]: Pow!