Funny enough, nobody in the area have A6/A7.....
US still uses A6 and A7. Then It just Saudi who have some A6 around. Portugal and Spain both have A5 but IIRC those are really small number. Dane A2 were in storage as they are upgrading to A5 themselves.
C-17 probably can, seeing M270 only weight around 27 tons. M198 are most definitely going over there, as they are cheap and inexpensive but still provide good fire support, probably more unit than M777 too. but the deployment rate is going to be slow.
as for we are thinking ahead, we both know this is going to end up like this, remember back then when they got the Brits sign on to provide artillery and I told you the possibility of HIMARS?
in fact I just went back and check all my old post and the sitrep I wrote, I am more or less 70% in the money, which suggested one thing. the Ukrainian is fighting this war as if we are fighting this war (because whatever I suggest I put myself in that situation, which I was brought up by US tactics.)
Which mean they are going to be more mobile and try to outflank the Russian when they have to take that operational pause eventually. Don't quote me on that, as this is a gut feeling, not supported by any Intel I have my eyes on, but I think it is more or less coming after Russia took Sieverodonetsk.