The Pirc Defense is called Ufimtsev Defence or Yugoslav Defence and originates from Vasja Pirc. Black answers 1.e4 with d6 then 2....Nf6 3....g6 and 4....Bg7.
1. e4 d6White moves
In the meantime White establishes a pawn center with e4 and d4. In earlier times around 1930 this chess opening had a bad reputation. Nowadays it is considered playable. The Pirc is difficult to play and if you are learning chess you should rather play 1...e5 and not 1...d6.
The main variation goes 1.e4 d6 2.d4 Nf6 3.Nc3 g6 ...(See below)
Possible is 1.e4 d6 2.d4 Nf6 3.Nc3 e5 (instead of g6) See below.
If White exchanges queens now with 4.dxe5 dxe5 5.Qxd8+ Kxd8 6.Bc4 Be6 7.Bxe6 fxe6 he has gained nothing. Instead he should continue to develop his pieces with 4.Nf3 (instead of 4.dxe5) and not exchanging queens.