Remember how under GW the war in Iraq didn't cost a thing?
The most obvious way in which the true cost of this war was kept hidden was with the use of supplemental appropriations to fund the occupation. By one estimate, 70% of the costs of wars in Iraq and Afghanistan between 2003 and 2008 were funded with supplemental or emergency appropriations approved outside the Pentagon's annual budget. These appropriations allowed the Bush administration to shield the Pentagon's budget from the cuts otherwise needed to finance the war, to keep the Pentagon's pet programs intact and to escape the scrutiny that Congress gives to its normal annual regular appropriations.
With the Iraq war treated as an "off the books" expense, the Pentagon was allowed to keep spending on high-end military equipment and cutting-edge technology. In fiscal terms, it was as if the messy wars in Afghanistan and Iraq were never happening.
More fundamentally, the Bush administration masked the cost of the war with deficit spending to ensure that the American people would not face up to its costs while President Bush was in office. Despite their recent discovery of outrage over the national debt, the Republicans followed the advice of Vice-President Dick Cheney that "deficits don't matter" and spent freely on domestic programs throughout the Bush years. The Bush administration encouraged the American people to keep spending and "enjoy life", while the government paid for the occupation of Iraq on a credit card they hoped never to have to repay.
https://archive.globalpolicy.org/pmscs/52336-how-the-us-public-was-defrauded-by-the-hidden-costs-of-the-iraq-war.html
I fully expect this "war" will be "free" too. You know, until a Democrat is back in the White House and then
they'll have to pay for it all....