They say that began with several smaller attempts by Iranian-backed groups in Lebanon to supply arms and was cemented in the Moscow meeting.
The groups that do conduct some military operations inside Iraq are Iranian-backed Shiite groups whose goals scarcely coincide with American interests.
These include an influential Iranian-backed Islamic Shiite group.
The political considerations have a central bearing on the continued detention of Western hostages by Iranian-backed groups in Lebanon.
A10 Hezbollah, the Iranian-backed Shiite group, has established a significant presence in Iraq, but it is not taking part in the attacks on American forces.
Israeli planes and helicopters carried out three attacks on bases of an Iranian-backed Muslim fundamentalist group in southern Lebanon today, killing four people.
Hamas, an Iranian-backed terrorist group, has claimed responsibility for the attack.
In an exchange of fire, five members of the Iranian-backed group were killed.
The use of the word Hezbollah has nothing to do with the Iranian-backed Lebanese group of that name.
Hezbollah, the Iranian-backed terrorist group, appears to be the dominant group in the area.