No.. it can't be.

[seriousbusiness]

It would depend greatly on the difficulty. On Very Hard and Hard that would be a difficult battle, although on Medium it should have been reasonably winnable. Indian longbows and elephants are especially dangerous, particularly defending walls. I would have starved them out.

[Celtic_Punk]

lol again, Baktria does not have the luxury of time, (at least in my experience, the Saka rauka were constantly on my spine and Pahlava were after my throat, and the AS were at my belly) You gotta move quick or you wont have enough funding to secure more land, letalone defend.

[Terraforce]

Haha, i have taken the city. I decided to take a risk and leave just 3 Hellenic Medium phalanxes and 1 persian archer and a general in Baktra, just enough to cover all the entrances into the square. I then sent a stack of whatever I could muster including my new fraction leader who happened to be the son and brother of my old fraction leader and heir. I got to the city only to find two units of archers, I attacked the city and the walls were still not repaired so I kinda just walked in and killed everybody. On another note Baktra was sieged 4 turns when I left by a full stack of AS units I let them build there equipment and they attacked me 3192 against my 637 I sealed of any entrances to the square and all of them came right down one street where they could not diverge anywhere because it was one single street so I rushed one of my phalanx around and crushed them between two units. Not one escaped. I gained a heroic victory.

[Senshi]

I actually love it that I cannot always just use my super composed army and take one city after the other, but instead get a really badass challenge now and then (e.g. as I reported once here:
https://forums.totalwar.org/vb/showthread.php?t=106850 )
I always play with no-reloads, because playing on H/M against dumbass AI you always are superior as human, no matter what faction. Getting kicked badly sometimes causes the real thrill and gives some touch of realism to the game.