Please imagine someone's husband just left the house and he is on a mission now. The woman's sister comes to her and asks where is her husband? What should she say then? Would it sound natural to say:
- He's just gone on a mission.
- He's gone to a mission. [it can just serve as a translation, but it sounds unnatural to me.
or let's suppose three months ago you were sent to a long-term mission (i.e. 2 months) and now when you are back home, you're talking to someone and explaining about that period of time. Does the sentence below make any sense to you:
- Once, I went to a long-term mission from the company side...
Also, please let me know about its idiomaticity.
I wonder if you could let me know what would you usually say in such a case if my suggestions do not sound idiomatic in this sense.