Training against an older version of the 300 is useless as it is obsolete. The variant (manned by Iranians) supplied to Syria is the S-300PMU-2. What 300 variant did Russia or the USSR supply to the Ukrainians? Does any one know? What Russian anti-air missiles versions is it supplied with?
More significant is the Krasukha-4 units EW units sent to Syria against which the US has only limited knowledge and, AFAK, no practical experience. Are these unit in the Ukraine and are they part of the training?
“More significant is the Krasukha-4 units EW units sent to Syria against which the US has only limited knowledge and, AFAK, no practical experience. Are these unit in the Ukraine and are they part of the training?”
I would venture to guess that Israel knows exactly what they are up against, knows how to defeat it and probably has one at some secret testing center in Israel.