More from The Economist as crowd sourcing shows troop and equipment movement..."Ukraine's eastern border is growing thick with Russian forces."

[Mark Kohut]

One video clip (left) posted on TikTok shows equipment at a station. The
background allows it to be “geo-located” to Novozybkov station in Bryansk,
around 35km from Ukraine’s border. In a second clip (right) another train
laden with armoured vehicles is visible at the same station, some of its
carriages decoupled. An eight-figure number emblazoned on the train can be
cross-referenced with a website that tracks railway movements. The train
began its journey in Yelnya—the camp being emptied—and travelled to
Novozybkov.
as yelnya empties and new units arrive from all over Russia, Ukraine’s
eastern border is growing thick with Russian forces. Consider the western
city of Kursk, famous for a second-world-war German-Soviet tank battle. One
of the units involved in that fight was the 1st Guards Tank Army, the
Russian army’s premier offensive formation, based near Moscow. Elements of
that army were spotted on social media, west of Kursk, last week. Other
units are also turning up at a training area to the east of the city,
thought to house the 6th Combined Arms Army. Henry Boyd of the
International Institute for Strategic Studies, a think-tank in London,
suggests that the new arrivals seen below might be elements of the Northern
Fleet's 200th Motor Rifle Brigade, normally based in Murmansk, a port near
the Finnish border.