Fiqh-us-Sunnah Volume 3, Zakaat and Fasting, Fiqh 3.064B.

Muslims who live at the frontiers, close to enemy land, can also be given sadaqah as an incentive to defend the Islamic territory. The author of al-Manar claims that this falls under the national defence. Jurists place it under the share allocated for the cause of Allah. It is similar to a military expedition. In our times, people who most deserve our help are those Muslims whom the unbelievers have brought over to their side by placing them under their protection or converting such Muslims to their religion. We notice that colonial powers are working for the subjugation of all Muslims and are trying to divert them away from their religion. Such states are allocating a certain portion of their resources to win over the Muslim hearts. Some they have succeeded converting to Christianity, and others have been influenced by or attracted to their tutelage. This is creating problems for Muslim states and Islamic unity. Are not such Muslims more deserving of zakah than those along the frontiers?