L. Oppenheim, The Future of International Law
“ If at the outbreak of a war he be resident in the territory of the enemy, cannot he be expelled? If he contribute to a loan raised by the enemy, will not his own state punish him for treason? Is it not the law of many states that if they go to war, an end is put to peaceful intercourse, and especially commercial intercourse, between their own subjects and the subjects of the enemy state? Must not the private person submit to requisitions, pay contributions, endure limitations on his freedom of movement, and obey the commands of the hostile occupant? ”
