In the selection, Washington uses the repetition of the phrase "As I have ..." in lines 4,5, and 7 to:
list several examples of what the military has done for the
troops to convince his audience the military will not abandon
them.
emphasize his dedication and experience as a fellow soldier to
show that he is not indifferent to the concerns of his audience.
gain sympathy from the audience, because he has suffered for
a good cause.
highlight his military accomplishments in order to earn the
respect and trust of his audience.