There are several major benefits foreign fighters, and only foreign fighters, can offer armed groups. They have knowledge and experience that the local population does not have and have connections in the international war industry. Usually they are more dedicated to their goals. Foreigners are better at raising funds in their home communities and thus provide armed groups with additional source of income. Finally, they can be successfully used by armed groups for propaganda purposes. On the other hand, it is much harder for the leaders of an armed group to manage foreigners versus locals. First, foreign fighters often do not speak the local language and are not familiar with the terrain. Second, they could have problems with the locals. Third, their presence in the group could decrease overall group cohesion. Fourth, they could be recruited as spies by foreign intelligence agencies more easily than locals. And finally, foreign fighters often joined the conflict with different motives than those of local fighters, which could lead to differences in combat strategy and tactics.