The Law of Nations or the Principles of Natural Law (1758)Emmerich de Vattel Of the Enemy, and of Things Belonging to the Enemy§ 69. Who is an enemy.§ 70. All the subjects of the two states at war are enemies.§ 71. and continue to be enemies in all places.§ 72. Whether women and children are to be accounted enemies.§ 73. Things belonging to the enemy.§ 74. continue such everywhere.§ 75. Neutral things found with an enemy.§ 76. Lands possessed by foreigners in an enemy's country.§ 77. Things due to the enemy by a third party.
     1.    Grotius, De Jure Belli et Pacis, lib. iii. cap. viii § 4.