More to the point, where was the Iraqi army? It should be able to overwhelm IS with ease. It has vastly greater numbers of troops, overwhelming firepower, & even without outside assistance, complete control of the air. Why is it losing?
1- The "inclusiveness" that was imposed on the Iraqi military resulted in a force riddled with 5th columnists (from the top to the bottom) who sell out their own troops to ISIS.
2- Iraq's military has only 30 Abrams tanks operational (100 in depot, about 16 destroyed)... that is spread over a spaghetti front several thousand kilometers in length and tens of thousands of kilometers square. They have another 200 MBTs from older generations too... but once again, far too few to matter.
3- Iraqi HUMVEES and M113s are LESS RELIABLE and LESS WELL ARMED than the ISIS technicals.
4- They have 3 Cessna Caravans and 5 SU-25s as an "air force" ... they do have a few dozen hellos spread over 2000km front... Meaning that the airpower element is pretty irrelevant in 99% of engagements since its simply unavailable.
Explosive-filled bulldozers should be easy meat for anti-tank weapons, or artillery in direct fire. A bulldozer blade is very thin & easily penetrated compared to the armour of a tank, & being packed with explosives, suicide bulldozers should be very easy indeed to destroy, causing massive damage to the forces deploying them if hit early. Why didn't this happen? Why were they not blown up as soon as they appeared?
Only one Iraqi unit actually has anti tank weapons. The 5th mechanised division in Diyala. Its been fighting against ISIS attacks from Baiji, Hawija etc... with them.
Units of the PMU have destroyed dozens of "incoming" VBIEDs and the videos are on liveleak or youtube should you wish to see some...
A few men on the front line with the right weapons & the will to use them should have smashed this attack. Where were the weapons to do this with? The Iraqi army has enough of them. Why were they not used?
What happened is that the US and Sunni Tribes asked the Iraqis to withdraw the "popular mobilisation" from Ramadi, promising that local sunni tribes and US airpower will effectively replace them. Once the PMU withdrew, Ramadi fell within a week.
Where were Iraq's Mi-35s, Mi-28s & Su-25s?
I do believe on those particular days there were sandstorms... so they were on the ground or fighting only in the hamrin hills and Baiji areas.
These question, & others, could be repeated over & over again.
Only because the quality of reporting and understanding of the conflict is horrendously weak .
How has this situation arisen?
The "international community" attempting to maintain a single Iraqi state against the wishes of the people who live there?
IS is weak, in terms of men & weapons.
They have "popular support" in the areas they control. When you think of Iraq, think of three "zones" Shia, Sunni, Kurd. See where ISIS can "easily take over" and where they can't seem to take over for love or money. Still the "same" Iraqis defending each area... why the different outcomes?
So ISIS is certainly not weak. It has money, popular support and more importantly it has effectively infiltrated the Iraqi military through the "inclusiveness" policies of bringing in and "reintegrating" unrepentant terrorists and baathists in Iraq's military.
It is fighting a conventional war for control of territory.
and it has only succeeded where it has popular support.
Why has it not been crushed?
Because the "international community" doesn't accept "sectarian shia militias and indiscriminate and unrepresentative" Iraqi armed forces to do that.
The balance of forces is entirely against it.
It has the popular support of Pan-Arab TV stations and populations at the least. It has open access to trade via Turkey and Kurdistan Region. It has both local soldiers as well as tens of thousands of foreign volunteers, it has access to weapons it buys, captures from syria and Iraq, weapoins it "captures" from "moderate" rebels etc... and it operates a high temp battle using reliable civilian vehicles to make rapid attacks.
What is wrong with the Iraqi army?
I've gone over this. read above.
"international community" won't allow the Iraqi army to kick out its illiterate "chief of staff" because he's a kurd. They won't allow Iraq to replace its "air force commander" who hasn't bought any fighters or trained any pilots and crews in the last 10 years because he's a kurd, It won't allow the Iraqis to summarily execute all the treacherous commanders because it would be "sectarian"... for example the US has forced the Iraqis to replace the Salahuddin Force Commander (who maintained Baiji refinery and organised the rout of daesh in Tikrit and the rest of Salahudin) because he was a southern "shia" ... and replaced him with a Local man from Tikrit... all fine, right. The BROTHER of the new commander is the "finance minister" of ISIS! And there are many many such "howlers"
& IS would quickly be reduced to a few guerrillas & terrorists.
nonsense. you could kill abu bakr al baghdadi tomorrow and it wouldn't change one thing.
Make commanders stay with their units - & severely punish (shooting might be appropriate) those who abandon their men.
I already mentioned this. You can't do that. Its sectarian.
Govern in a way that shows the state is for all Iraqis, not only Shias.
You seem to think that the state was governed in such a way. Quite simply Kurds don't consider themselves Iraqis despite having about double the average Iraqi income now funded by the "shias" .. and Sunni arabs made up a dispropotionate percentage of ministers, military commanders and judges even under Maliki... The real issue is that the Sunni Arab community in Iraq simply REJECTS any Iraq that is different to the "glorious past". And no number of positions of power or economic opportunities will change that. Its ALL or NOTHING.
Find all the officers who had 'ghost' soldiers under their command, & give them the choice of punishment for treason, or fighting at the front. And so on . ..
No. Once again, you're making the mistake here. Can't do that. It would seem to be a sectarian move to purge Sunnis.