What is the meaning of Forlorn_hope?

  1. A small troop of soldiers picked to make an advance attack, or the first attack; a storming party.
  2. In the plural form forlorn hopes: the soldiers collectively making up such a troop; a group of reckless adventurers.

A small troop of soldiers picked to make an advance attack, or the first attack; a storming party.

In the plural form forlorn hopes: the soldiers collectively making up such a troop; a group of reckless adventurers.

Any dangerous or hopeless venture.

Source: wiktionary.org