Regular forces in Iraq are stressed out and overstretched.
Liberia insisted that its regular forces were not involved.
Generally, reservists have been used as backfill to complement the regular forces, not replace them.
About 20,000 Reserve and Guard troops are supporting regular forces in Iraq, Afghanistan and elsewhere.
Violations, whether by the regime's regular forces or militia, will not be accepted passively.
Saddam Hussein's much talked-up Republican Guard units melted away; the war featured no big battle between regular forces.
The Israeli military chief of staff, Lt. Gen. Benny Gantz, went south to brief regular forces and reservists.
Militias attacked police posts, clashes erupted in the town of Abyei, and northern and southern regular forces piled in.
"We face regular forces and we also face irregular forces with long hair, beards, and their codes of conduct.
There was no fighting in the city between regular forces but there were acts of retribution and revenge.
The risk of armed conflict is acute because the zone in dispute is a mosaic of well-armed communities backed by regular forces.
