Illegal immigrants to be recruited for service in U.S. military.

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6. cannon fodder

Cannon fodder is an informal, derogatory term for combatants who are regarded or treated as expendable in the face of enemy fire. The term is generally used in situations where combatants are forced to deliberately fight against hopeless odds (with the foreknowledge that they will suffer extremely high casualties) in an effort to achieve a strategic goal; an example is the trench warfare of World War I. The term may also be used (somewhat pejoratively) to differentiate infantry from other forces (such as artillery, air force or the navy), or to distinguish expendable low-grade or inexperienced combatants from supposedly more-valuable veterans.

The term derives from fodder, as food for livestock. Soldiers are the metaphorical food for enemy cannon fire.[1]

http://en.wikipedia.org/wiki/Cannon_fodder