George Francis Robert Henderson and Thomas Barclay, 1911 Encyclopædia Britannica (1911)
“ Territory is considered as occupied when it is actually under the authority of the hostile army. The authority having passed into the hands of the occupant, the latter takes all possible steps to re-establish public order and safety. Compulsion of the population of occupied territory to Occupation of hostile territory. take part in military operations against their own country, or even give information respecting the army of the other belligerent and pressure to take the oath to the hostile power are prohibited. ”
