LAKE SELIGER (Russia): Ukraine called on Friday for full membership of Nato, its strongest plea yet for Western military help after accusing Russia of sending in armoured columns that drove back its forces on behalf of pro-Moscow rebels.

Russian President Vladimir Putin, defiant as ever, compared Kiev’s drive to regain control of its rebellious eastern cities to the Nazi invasion of the Soviet Union in World War Two.

He announced that rebels had succeeded in halting it, and proposed that they should now permit surrounded Ukrainian troops to retreat.

Speaking to young people at a summer camp, Mr Putin told his countrymen they must be “ready to repel any aggression towards Russia”.

He described Ukrainians and Russians as “practically one people”, language that Ukrainians say dismisses the very existence of their thousand-year-old nation.

The past several days have seen pro-Russian rebels suddenly open a new front and push Ukrainian troops out of a key town in strategic coastal territory along the Sea of Azov. Kiev and Western countries say the reversal was the result of the arrival of armoured columns of Russian troops, sent by President Putin to prop up a rebellion that would otherwise have been near collapse.

Rebels said they would accept Mr Putin’s proposal to allow Kiev forces, who they say are surrounded, to retreat, provided the government forces turn over weapons and armour.

Kiev said that it only proved that the fighters were doing Moscow’s bidding.

Full Ukrainian membership of Nato, complete with the protection of a mutual defence pact with the United States, is still an unlikely prospect. But by announcing it is now seeking to join the alliance, Kiev has put more pressure on the West to find ways to protect it. Nato holds a summit next week in Wales.

Nato’s Secretary General Anders Fogh Rasmussen said he respected Ukraine’s right to seek alliances.

“Despite Moscow’s hollow denials, it is now clear that Russian troops and equipment have illegally crossed the border into eastern and south-eastern Ukraine,” Mr Rasmussen said.

“This is not an isolated action, but part of a dangerous pattern over many months to destabilise Ukraine as a sovereign nation.” Kiev said it was rallying to defend the port of Mariupol, the next big city in the path of the pro-Russian advance in the south-east.

“Fortifications are being built. Local people are coming out to help our troops, to stop the city being taken. We are ready to repel any offensive on Mariupol,” military spokesman Andriy Lysenko said.

Published in Dawn, August 30th, 2014