 The Baltic countries prepare for the invasion of Russia. Russia's devastating invasion of Ukraine has sent shockwaves through NATO's Baltic members who fear they could become future targets of Russian aggression. These countries along the military alliance's front line are now scrambling to make sure they're protected should the Russian military ever come knocking. The Business Insider Edition wrote about it. Estonia, Latvia and Lithuania have all increased their defence spending and NATO has boosted its presence in the region as a result of the Ukraine war. But in recent interviews with the Insider, Prime Ministers and top government officials from these three countries said their militaries still need additional security guarantees and combat capabilities. There is an imminent need of a stronger NATO presence in our region. Estonia's Foreign Minister Urmas Reinsalu said, Russia is an existential threat, particularly to our region countries, but in a broader sense to all Europe. Collectively, the Baltics share a border with Russia that spans over 500 miles and another border that is slightly longer with Belarus, which is seen by many Western observers as a Russian puppet state. Lithuania, the most southern of the Baltic states, also shares a small border with a tiny militarised Russian exclave called Kaliningrad. The proximity is disconcerting for these states. But Russian struggles in Ukraine are little comfort to officials in Estonia, Latvia and Lithuania who worry that if they don't act now, they could be caught unprepared if Russian President Vladimir Putin ever decides to wage war on NATO and pick the Baltics as his opening battleground. Some leaders in the Baltic countries have said that they ultimately want to host more NATO troops, including permanent brigades, in the years to come. The idea is that a large troop presence could serve as a critical first line of defence in the event of a Russian attack, holding off the Russian advance until other alliance forces arrive. Russia is the most direct threat to European security right now. Estonia's Prime Minister Kaja Kalas told Insider, no country in the world can then feel safe next to an aggressive neighbour.