CNN reports April 26 of a "perilous face-off" as Russian state news complained that Ukraine has mobilized 15,000 troops in the suburbs of Slavyansk in the country's east "in order to wipe out the city and its residents." A Defense Ministry source said the number of Ukrainian troops put the pro-Russian militants who control the city at a disadvantage, as the latter are "armed only with small amount of pistols and shotguns." Of course, Russia's military massively outweighs Ukraine's and the Defense Ministry's statement is a barely veiled threat of intervention. Meanwhile, USA Today reports that Russian warplanes have entered Ukrainian airspace several times in the last 24 hours, according to the Pentagon. The violation of Ukraine's airspace follows war games that have moblized some 40,000 Russian troops to the Ukrainian border. Earlier this week, the Pentagon deployed 600 paratroopers to Poland and the Baltic states "to reassure NATO allies in the region about the US commitment to their defense." Ukrainian Prime Minister Arseniy Yatsenyuk charged that Moscow "wants to start World War III" by seeking to take over Ukraine.

NATO on April 1 began a two-day exercise, briging more than 100 US Air Force personnel, along with F-15 fighter jets and a Germany-based Airborne Warning and Control System (AWACS) craft, to former Soviet air bases in Lithuania. Denmark is also sending six F16 fighter jets to the Baltic as part of an expanded NATO air policing mission, with regular patrols to begin May 1. The incidence of Russian jets flying close enough to Baltic airspace this year to prompt NATO jets being scrambled has increased to about once a week, according to Lithuania's defense ministry. NATO jets were scrambled about 40 times in both 2012 and 2013; in 2004, the year the Baltic republics joined NATO, it only happened once.

In response to the Crimea crisis, EU Energy Commissioner Guenther Oettinger announced he is to delay talks with Russia on the South Stream gas pipeline that would export Russian gas via the Black Sea. The South Stream line strategically bypasses Ukraine, which currently hosts the main arteries for export of Russian gas. (Reuters, March 10) The European Commission has already postponed discussion of the OPAL pipeline, part of the Nord Stream project, which similarly bypasses Ukraine via the Baltic Sea. (Voice of Russia, March 11) Russia's giant Gazprom, which uses the existing Nord Stream line to send gas to Germany, plans to start shipments to Europe through the South Stream line at the end of 2015. Russia is seeking to boost gas exports to Europe as much as 23% over the next 20 years. (Bloomberg, March 12)