One TripleA TSVG comprises all the history so far up to a position. The format is compressed or coded somehow, unparseable as text anyway. One may understand the format from the Open source.
Loading the TSVG into TripleA, it can reconstitute the position at any moment between actions - including at end of R1 of any turn. TripleA also does some good summaries inside, including IPC incomes and total unit values by countries and Axis/Allies.