Synonyms for March up to the cannon's mouth:

• v.

  •run the gauntlet (verb)
  • come to grips with.

• Other synonyms:

  •Other relevant words:
  • take the bull by the horns,
  • meet head-on,
  • take bull by the horns,
  • be a target,
  • be a whipping boy,
  • court disaster,
  • face criticism,
  • face one's punishment,
  • go in harm's way,
  • go through fire and water,
  • take one's life in one's hands,
  • take potshots,
  • run the gauntlet,
  • courting disaster,
  • taking potshots.