Some of this is just Russia being Russia. But military and intelligence analysts in Washington and Europe say that the increased in tensions here is part of a overall game of sorts to test NATO's response. With up to 4,000 troops stationed in the Baltic corridor beginning in early 2017 -- those tensions and harassment will likely increase.
The Baltic States have long had troubles with Russia since gaining their independence in the early 1990s after a 50-year Soviet occupation. But today, much of Western Europe is paying attention to signs of aggression, according to Kier Giles, associate fellow at Chatham House, a London-based security think tank.
"The Baltics have been cast as troublemakers in the EU," Giles said. "They are still getting to used to the fact that everyone now is agreeing with them. They are appreciating that they don't have to point out the security challenges."
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If Russia did make a move, it wouldn't take long to swallow its former satellites.
A 2016 study by the Rand Corporation estimates it would take Russian forces as little as 36 hours to capture the Estonian capital of Tallinn, or a bit longer for Latvia's capital Riga.
Russia has stationed 22 infantry battalions on its northeast border from Estonia to Poland, while NATO fields 12. But NATO doesn't have any tanks or armored vehicles except for the single U.S. Stryker brigade with its eight-wheeled vehicles. The war games run by Rand analysts didn't go so well for the West.
"By and large, NATO's infantry found themselves unable even to retreat successfully and were destroyed in place," the report stated.
It's not just weapons that make up Russia's arsenal. They are also pretty good at both spying and cyberwarfare, according to Estonian officials.
"Russia has increased its capabilities of espionage," said Martin Arpo, deputy director of the Estonian Internal Security Service (known by its Estonian name, Kapo), which has nabbed eight Russian agents since 2008. "It was continuing before 2014 and has continued to grow after that. After we caught some Russian spies, it's obvious that Russia is desperate to find new spies here."
In 2007, Estonia's government websites were hit by a massive denial of service attack from groups affiliated with the Kremlin. Since then, Estonia has beefed up security by becoming more diverse about where and how it stores information, and partnering with private industry to monitor and identify attacks.
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"We see constant mapping or our networks and limited attacks to see our vulnerabilities," said Taimar Peterkop, director general of Estonia's Information System Authority, which safeguards the nation's computer security. "
Peterkop says his biggest worry is the possibility of attacks on Estonia's critical infrastructure such as water, power or other utilities. That's what happened in Ukraine in December 2015, when cyberattacks shut down three electrical substations and turned out the lights for 225,000 people for several hours.
U.S. officials investigating the Ukraine cyberevent were careful not to blame Russia officially, but Peterkop says the source is not hard to figure out. "The only country we have to worry about is Russia," he said.
Back in the woods at the Tapa base, Capt. Don Duong, of Huntington Beach, Calif., says the Estonian terrain poses is own challenges for both defenders, and any potential invader.
The only armor in Estonia is this U.S. Stryker brigade.