If you remember, this was Orestes' sister who was sacrificed in the prologue.
Tauris means modern-day Crimea (The part of Ukraine that Russia recently annexed), which borders the Black Sea ('unfriendly sea' to the Greeks); the Black sea is connected to the Mediterranean by the Bosporus Strait (One of the reasons of the Russian annexation was to gain a port on the Black Sea that didn't freeze during winter - unlike all of Russia's other European ports - and hence gain access to the rest of Europe).
***
From the Journals of Iphigenia:
So gentle is she, Artemis the holy,
She will not have her sacred altar
Stained with innocent blood.
She healed me, born me away
To this cursed barbaric land.
A fierce people here lives.
Their savage custom to spill
The blood of any Greek they seize.
***
In greatest irony, Artemis had me
Be the high priestess of her sacred grove.
I have served and I have served,
Countless doomed bodies I cleansed:
Old, young, strong, frail, good, evil,
All went to Hades' dark embrace.
My own countrymen, my brothers and sisters,
To be put to death by my cursed divine hand.
***
The guilt is unbearable,
I wish for deliverance.
I pray toward Apollo,
And Truth he speaks:
There is but one thread
For me in this world:
Not father the betrayer
But little brother dear.