Easy picking for troops with the right weapons. Read up on the how Apache gunships were ambushed in Najaf by insurgents with small arms. UGV's would be more durable.Drones soon will control and patrol.
Loitering drones with machine guns flying or hovering low is round the corner
Was it just poor tactics or some deeper problem that caused the failed Apache mission?
Agreed but Infantry and ground forces will adapt. Flying drones are not very durable. Shooting at flying targets will have to be taught in infantry school. Low costs SAM's will be developed eventually.the era of drone wars is upon us.