The high-octane romantic stunt was filmed in a video published by the defence ministry on Friday, Valentine's Day.

As snow fell, the T-72B3 tanks rolled into position on the Alabino training ground outside Moscow.

Lieutenant Denis Kazantsev led his long-term partner Alexandra Kopytova into the centre as she held her hands over her eyes, the defence ministry's TV channel Zvezda reported.

Kazantsev, a platoon commander, went down on bended knee, holding a bunch of red roses.

"We've been together a very long time. We've stood the test of time and distance. Marry me!" he said as his girlfriend nodded silently. He then put a ring on her finger.

"I still don't understand what's going on," Kopytova told a television reporter at the scene. "It's very unexpected."

The tanks used for the romantic manoeuvre also take part in the annual Victory Parade on Red Square, Zvezda reported.

"No one has ever seen such a large-scale proposal," its reporter said.

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