Opposition leader Juan Guaido speaks Friday during a press conference in Caracas, Venezuela. In the fourth month of their standoff, President Nicolas Maduro and Guaido are unable to deliver a knock-out blow as Venezuela spirals deeper into neglect, isolation and desperation. Credit: Martin Mejia | AP

Back in early March, it seemed that both sides in Venezuela had decided a long drawn out crisis was better than a civil war. It appears that the leader of one side has now changed his mind.

Almost four months ago, Juan Guaido challenged President Nicolas Maduro on the grounds that his re-election last year had been fraudulent. Guaido claimed to be the legitimate president himself, and Maduro did not arrest him, presumably because he feared that it would cause a civil war that he might lose. Since Guaido wasn’t sure he would win it either, he also held his fire.

The political operation to remove Maduro was clearly coordinated with Washington. Guaido was doubtless told that if he declared himself president, the United States and 50 of its friends and allies would recognize him — which they promptly did. But he still avoided a showdown with Maduro, and restricted himself to making speeches (which Maduro did not interfere with).

Both men knew they were on shaky ground legally. Maduro won a rigged election, but Guaido didn’t even run in it.

As president of the National Assembly, Guaido is in the line of succession if the president dies or goes crazy, but whether he has the right to replace a sitting president just because he believes the president cheated in the election is the sort of question that makes lawyers rich. Most non-lawyers would say he doesn’t have that right.

That’s beside the point. This is a power struggle, in which Maduro still controls the army, but Guaido has powerful foreigners and a large but unknown portion of the Venezuelan population on his side. Both men decided to play a waiting game, in the hope that the tide would turn in their direction. It was the right choice.

However, for reasons best known to himself, Guaido has now changed his mind. Maybe he thinks the tide is now running in his direction, or maybe he fears that Maduro will win by default if he doesn’t act now, but he has clearly decided that the showdown should happen now.

On Monday, he released a 3-minute video showing him together with men in Venezuelan military uniforms and claiming that the armed forces have come over to his side. “The moment is now,” he said.

By going on to a military base and trying to turn the military against the government, Guaido has committed high treason, and Maduro has to respond. Yet, it is not at all certain that Guaido’s supporters, numerous though they may be, will win the battle in the streets.

He summoned them to come out on the streets of Caracas on Tuesday, and called on the army to support them. They did come, but so did Maduro’s supporters (or more precisely, people who still support Hugo Chavez’s original revolution, though not many of them have the same deep affection for Maduro). More than a hundred people were injured during the day.

And, yes, some dozens of National Guardsmen did switch sides on Tuesday, but thousands did not. More importantly, the regular army has remained loyal to Maduro. Guaido called his supporters out again on Wednesday, but at the time of writing (Wednesday morning), there is no sign that Maduro is about to flee the country, or that his army is going to defect.

It’s too early to be sure, but it looks like Guaido moved too soon. He will probably soon be in jail if he does not flee the country. His political mentor and party leader, Leopoldo Lopez, has already sought refuge with his family in the Spanish embassy. And Maduro has already claimed on television that he has defeated the “attempted military coup.”

What persuaded Guaido to abandon the slow and cautious strategy he has pursued for the past four months and go for broke instead? The suspicion must be that he did it under pressure from Washington, where President Donald Trump is impatient, Secretary of State Mike Pompeo is compliant and nobody understands Venezuela very well.

Nobody except the U.S. armed forces, which have made it quietly clear from the start that they do not want to end up giving military support to Venezuelan rebels. But nobody in Trump’s Washington listens to the army.

Gwynne Dyer’s new book is “Growing Pains: The Future of Democracy (and Work).”