A very interesting war for me in Arabia overall. Persia, (my general impression is) stripped the northern frontiers of all but one army in an attempt to win the Arabian theatre before vR could turn his attention south; initially it faced Ethiopia and Tripoli together and was pushed back, but Tripoli soon dropped out of the offensives due to lack of manpower, and the war was between roughly equal numbers thenceforth.
With equal numbers, unfortunately, Persia had the advantage; Military Drill, the Shia morale bonus, and Persia's discipline-granting ND combine to give its army a significant one-for-one qualitative advantage over mine. Also, his king was a significantly better general than my leader.
Persia thus blunted my offensives towards Baghdad, and I never got closer than Basra. However, we both had deep manpower pools and the fight pretty much settled down to stalemate (although I had to scramble a bit to keep it there). When the war ended, Persia had pushed back slightly from the high-water mark, but the fighting and occupations were still in Persia. I didn't wipe any of his stacks and he didn't wipe any of mine, and, as far as I know, neither of us were yet low on manpower. Persian WE was higher and growing faster, perhaps 10 to my 7, but neither of us had much rebel trouble.
Bavarian surrender in Europe meant the end of Persia's war effort as well, but the peace was light: two Arabian provinces to Ethiopia, and a third which Mayi no longer wanted after the peace I bought back for the same price I once sold it to Persia for. I don't believe any land changed hands between Persia and the Slavics, but I do not remember for sure.
Ethiopia had 36k in India of which most were sent to invade the Komgol Commonwealth, but as noted, I paid very little attention to the Komgol theatre, which was hardly relevant compared to the war in Persia (which itself was hardly relevant compared to the war in Europe, I'm sure
). My general impression coincides with KOM's, namely, that the Komgol Commonwealth scored several victories in Tibet but was crushed in Punjab and Siberia.