8.Turkey Turkey It was perhaps the struggle of the other countries sharing borders with the regions where the Islamic State has a strong presence, the struggle in Syria or the probability of clashes with the Kurdish separatist organization, PKK, which made Turkey realize that it needs to prepare itself to face danger head on, if and when it approaches, and decide to increase its investment in defence in 2015 by 10%. Its defence budget is at $18.18 billion. Its army size, including regular troops and reserves, is just above 660,000.