Suicide troops have nuances, certain death is a tad different from likely to die.
It does depend on whether they've been brainwashed, and/or incentivized.
In Europe, we have the concept of the Forlorn Hope, where survivors of a successful attack will get rewarded, contrast that with Penal Battalions, where compulsion is used, and it becomes more of a question of certain punishment and possible death.
With drones, they'd have to be self aware, and be inclined to self preservation.
Disagree. They could be self-aware but programmed to only be concerned with self-preservation only to the extent it enables completion of their present objective.
Probably what Carl did, and I assume that long walk off a short pier was an instruction to eliminate evidence of his existence, to minimize damage to the timeline.
And then he pondered upon the meaning of his existence.
Certainly not in the 23rd century. Even Scotty, who knew about transparent aluminum, knew nothing about smart phones, or communicators with cameras . . .
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There are three types of Travellers with Math-3+: those who can count, and those who cannot.
Our Traveller Universes clearly are at variance. Blessed be the variance!