Extremely Advanced Jonin, Kages assign their best shinobi, ANBU or their best Jonins, these missions. These kinds of missions can involve seige, attack and hopeful destruction of an enemy village; the escort of a top-rank person such as a Kage or Sannin on a journey which may contain any given dangers; or capturing a A-Rank or S-Rank missing-nin.
Advanced Jonin take part in these missions. These kinds of missions can involve capturing a strong missing-nin or escorting a very high ranked person on a journey that may have any given dangers, aside from entering an enemy village.
Advanced Chunin and sometimes Jonin take part in these missions. These kinds of missions can involves escorting people of over-average rank on journeys that may involve attack from Jonin or Chunin ninja.
Chunin take part in these missions. These kinds of missions can involve escorting people of average rank to places or keeping order at nonviolent events.
