De jure belli ac pacis was created in 1625.

jure power = legislation ;facto power=justice

"De jure" means "concerning law" while "de facto" means "concerning fact". A state may be de jure sovereign without being de facto sovereign, because a greater nation maintains economic or political hegemony over them, as Syria did with Lebanon. Or vice versa: de facto sovereign without being de jure sovereign, like the tribal areas of Pakistan.

De jure refers to something being based on law or formal authority, while de facto refers to something being based on actual practice or reality. In some situations, there can be a misalignment between de jure and de facto, where something is legally mandated (de jure) but not followed in practice (de facto).