Russia agreed to provide military training for three leftist regimes in Latin America and increase military visits and exercises following a visit last week to the region by Moscow's Defense Minister Sergei Shoygu, Pentagon officials said.
Shoygu met with defense and military leaders in Cuba, Venezuela, and Nicaragua and signed several agreements on warship visits and military training during the visit, which ran from Feb 11 to 14.
It is not clear whether any new arms deals were completed during the visit.
Defense officials said the Russian leader is seeking bases in the region for strategic bomber flights that Shoygu recently promised would include flights over the Gulf of Mexico and Caribbean. ..."
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2020...
Russia has pledged to boost military and economic co-operation with Venezuela to help the South American nation deal with growing US pressure.
Russian Foreign Minister Sergei Lavrov’s comments came after his meeting with Venezuelan President Nicolás Maduro in Caracas.
Mr Lavrov said any attempts to remove Mr Maduro’s government by force were unacceptable.
The US accuses Mr Maduro of leading a corrupt and brutal regime. ...”
“Russia is a key ally of Venezuela, lending it billions of dollars and backing its oil industry and military.”
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You can include in this alliance, communist China, communist North Korea, and Iran.
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2015.....
Russia and North Korea declare 2015 a ‘year of friendship’
“The biggest cause for concern is the growing military alliance between Russia and North Korea, with the two regimes recently announcing plans to conduct a series of joint army, navy and air force exercises this year.”
—Julian Ryall, Tokyo - Mar 11, 2015 - The Telegraph

Obama, Chavez, and Maduro (note the "soul-bro" handshake)