§ 119. According to articles 1-5 of the Geneva Convention,[250] the sick and wounded persons belonging, or officially attached, to armies must be respected and taken care of, without distinction of nationality, by the belligerent in whose power they may be. Should, however, a belligerent necessarily be compelled to abandon such sick and wounded persons to the enemy, he must, so far as military exigencies permit, leave behind with them a portion of his medical personnel to take care of them, and the necessary material. The sick and wounded who have fallen into the hands of the enemy are prisoners of war, but belligerents may exchange or release them, or even hand them over to a neutral State which has to intern them until after the conclusion of peace. After each engagement the commander in possession of the field must have search made for the wounded and must take measures to protect them against pillage and maltreatment. A nominal roll of all wounded and sick who have been collected must be sent as early as possible to the authorities of the country or army to which they belong, and the belligerents must keep each other mutually informed of any internments and changes as well as of admissions into hospital. It is specially stipulated by article 5 that, if a military authority finds it necessary to appeal to the charitable zeal of the inhabitants to collect and take care of, under his direction, the wounded and sick of armies, he can grant to those who have responded to his appeal special protection and certain immunities. [Footnote 250: The stipulations of the Geneva Convention are for the most part of a technical military character, and it is, therefore, impossible in a general treatise of International Law to enter into any details. Readers who take a deeper interest in the matter must be referred to the most valuable article by Macpherson in _Z.V._ V. (1911), pp. 253-277.] [Sidenote: Medical Units and Establishments, and Material.] § 120. In order that the wounded and sick may receive proper treatment, mobile medical units as well as the fixed establishments of the medical service must be respected and protected by the belligerents, but this protection ceases if these units and establishments are made use of to commit acts harmful to the enemy, for instance, to shelter combatants, to carry on espionage, to conceal arms and ammunition (articles 6 and 7). But article 8 expressly enacts that the units and establishments do not forego protection:--(_a_) in case the personnel is armed and use their arms for their own defence or for the defence of the wounded and sick under their charge; (_b_) in case, in default of armed orderlies, units or establishments are guarded by pickets or by sentinels furnished with authority in due form; (_c_) in case weapons and cartridges, taken from the wounded and not yet handed over to the proper department, are found in units or establishments.