(CNN) The four men in green walk calmly down the street, to gentle clapping from the people around them. They appear to be defectors, shown on a video posted to social media from Wednesday in the town of Herran, Colombia. While CNN has not been able to verify the video, the scene is now a common one in Colombia, from a steady drip of Venezuelan soldiers that have given themselves over to Colombian immigration officials over the past week. As of Thursday, an astounding total of 567 had defected.

This is perhaps the most enduring sign of change since the world was startled by clashes last weekend, when Venezuelan opposition protesters tried to force humanitarian aid into the country over border crossings, past Venezuelan riot police and pro-Maduro gangs.

Now, military defectors have crossed over with stories of hunger, corruption and abuse. The closure of the Simon Bolivar International Bridge at the border has not just increased tension between the Venezuelan National Guard who police it, and the Colombian police who have endured tear gas over the past week; it has also robbed many Venezuelans on the other side of the border of their livelihoods.

Thousands of Venezuelans come into Colombia daily to work, or buy food to take back. The crossing was a lifeline. And now that it is closed, along with the rest of the border between Venezuela and Colombia, the anger builds.

So what's next for this standoff? Diplomatically, the path ahead is predictable. Russia's support of President Nicolás Maduro is unwavering, rhetorically at least. Analysts question Moscow's desire to fund and assist what many say is a chaotic and corrupt kleptocracy on the other side of the world indefinitely. But for now, their veto at the United Nations prevents resolutions that could further corner the Maduro government, and assures the Cold War nature of this standoff continues to distract from the humanitarian crisis at its heart.

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