Answer:
pathos
Step-by-step explanation:
The rhetorical technique used here is is pathos.
Pathos is a rhetorical technique which appeals to the emotions of the audience. It is actually used to invoke feelings of the audience.
We see that in the statement, the speaker said "I do not think, comrades, that I shall be with you for many months longer, before I die,..." Such statement will invoke the emotions of the audience. The speaker's statement about his death actually arouses a feeling of pity and sorrow in the audience.