Air Commodore Terry van Haren, who heads up Australia's air combat operations over Iraq and Syria, believes the Iraqi Security Forces and US-led coalition have now reached a 'tipping point', Sky News reported on Tuesday.
Commander of the task unit group Captain Steve Young says there are signs ISIS is losing will.
If you're an optimist you could say we're breaking the back of ISIS.
The Iraqis are setting the drum beat on the pace and intensity of the war effort.
Mosul, the Iraqi capital of the so-called ISIS caliphate, fell in July after a nine-month campaign.
In August the offensive against Tal Afar defied all expectations and was done and dusted in 10 days.
With the Iraqi government due to face voters in April or May 2018, clearing the country of all ISIS territory would no doubt bolster Prime Minister Haider al- Abadi's chances.
Much of the prime minister's popularity rests on recent military successes along with some level of economic rebound.
Iraqi Security Forces could potentially over stretch themselves as they push into new areas and stabilise reclaimed territory.
ISIS has been leaving sleeper cells behind in some cities.
The lawless neighbor next door may also prove a hindrance.
ISIS doesn't see a border between Iraq and Syria, just open desert.
And the eastern Syrian region is regarded as Wild West territory, never having had strong government control.
Commander van Haren says three months into the campaign to recapture the ISIS stronghold of Raqqa, the offensive is 'going well but slowly'.
US Brigadier General Derek France, who commands the 380th Air Wing, is predicting a tough fight against ISIS in the Euphrates River Valley region between both Syria and Iraq.
He's more pessimistic on time frames.
'To say all the ISIS fighters will be out of Iraq by May that seems a stretch to me,' he added.
Australia has six Super Hornets conducting sorties across Iraq and Syria, along with an air-to-air refuelling tanker and Wedgetail early warning and control aircraft.
The Australian air strike contribution represents about five per cent of the overall coalition effort.
Australia's total personnel contribution to the fight against ISIS is 780 - 300 in air operations, 300 training and mentoring Iraqi soldiers and police and the rest doing special operations.
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