For more than six months of war in Ukraine, Russia would have lost more than 900 special forces fighters, paratroopers, marines and pilots, the Russian service of the BBC reports with reference to official data, reports The Moscow Times. Replacing them is a problem because training costs a lot of money and requires many years of training. Military pilot training takes up to 17 years and costs $14 million, the BBC reports.

For Moscow, the death of these trained soldiers is a big problem because their replacement is very expensive.

Since the beginning of the invasion, at least 337 marines have died, the Russian National Guard has lost 245 soldiers, Russian military intelligence has lost 151 servicemen, elite airborne units have lost 144 servicemen, the Federal Security Service and the Federal Security Service together have recorded 20 deaths.

Most of the dead were officers, according to data used by the BBC, publicly available information on Russian military deaths, including local media reports.

In addition, at least 67 fighter pilots, including navigators and mechanics, were killed.

Military pilot training takes up to 17 years and costs $14 million, the BBC reports.

The real numbers of elite Russian servicemen killed in the war in Ukraine may be higher, the BBC reports.

The Russian Ministry of Defense last updated the number of dead soldiers to 1,351 in March.

Western defense officials estimate that more than 80,000 Russian soldiers have been killed and wounded since the invasion began.

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