How does richard lovelace depict war in this excerpt from “to lucasta, going to the wars”?

and with a stronger faith embrace
a sword, a horse, a shield.

yet this inconstancy is such,
as you too shall adore;
i could not love thee, dear, so much,
loved i not honour more.

as a deplorable act
as a forced sacrifice
as an honorable mission
as a necessary rite of passage