Invincible God Of War

He was a mere son-in-law whose only merit was marrying the most beautiful woman in that family.
Everyone looked at him with contempt, but he didn't care, his only concern was his wife, only she could tame this man who was secretly the general of Dragon City, his hands had ended life of countless enemies. He was once the god of war, a man who stood alone against a thousand armies.
Although he now lived the life of a common man, the commander of Dragon City begged for his return, as the city was about to fall to the enemy. However, for this general the main thing was his wife, as long as she was happy, so was he.
Until One day..