Palmyra: Nessa no Umi to Binaru Senki

The main character suddenly warped to a battlefield in the ancient Arabian country of Palmyra. Will he be able to survive the war taking place against his will and return to his home one day? Palmyra is located between two big countries. When Princess Waba is on her way to one of the countries as a delegate, she sneaks out of the delegation. She enjoys freedom for a while, but she is captured by slave traders. What will happen to her...?