The phrase "fled advancing" is correct and usable in written English
You can use it to describe someone or something quickly retreating from a dangerous situation. For example, "The deer fled advancing hunters with their guns."
He and other monks fled advancing Soviet troops and, by a circuitous route, arrived at the Jordanville monastery in 1946.
When Ferdinand IV, King of Naples, fled advancing French troops in 1798 he took with him to Palermo some 20 works from the remarkable Farnese collection, his grandmother Elisabetta having been the last of the Farnese line.
In 1799, when Charles's son, Ferdinand IV King of Naples, fled advancing French troops, he took with him to Palermo some 20 works from the Farnese Collection its Titians and "Antea".
GUVECCI, Turkey — From a rooftop in this dusty border town, Bilal looked out across the rugged valley to an abandoned refugee camp where he had fled advancing Syrian forces, fearing for his life, only to discover something quite unexpected: the feeling of freedom.
A senior United States official said the scorched-earth tactics adopted by some Iraqi soldiers and members of the Iraqi government as they fled advancing American troops appeared to have followed a script and may well have been a first stage in the insurgency.
They had heard the same story repeatedly that day told by stragglers fleeing advancing Confederates.
AS a young refugee, Henry Siegman found himself fleeing advancing German troops in Belgium early in World War II.
Their father, Ralph Miliband, was a Marxist intellectual and writer who reached Britain from Belgium in 1940 after fleeing advancing Nazi forces.
In the end he decided against it; too many civilians, he realized, were using the roads to flee advancing Union soldiers.
The officials said they had no other evidence to suggest that the Tanzanian, Issaya Nombo, might be tied to members of the Qaeda terrorist network, who appear to have left the document in a cave while fleeing advancing American forces.
In the BBC interview on Sunday, Mr. Miliband used the occasion to invoke, in a humorous aside, a family history that right-wing critics have adduced as part of their 'Red Ed' attacks — the fact that the brothers' father, Ralph Miliband, was a Marxist intellectual and writer who reached Britain from Belgium in 1940 after fleeing advancing Nazi forces.
