The Russians did not see that the Germans had already aban-
doned their outermost positions on purpose, so as to absorb
the weight of the bombardment, and so, after a brief unopposed
advance, the Russians ran into dogged opposition and fulmi-
nating counterattacks. Moreover, the German defences on this
sector were exceptionally strong, for they lay on the direct ap-
proaches to Königsberg and, for once, the Germans had
reached an accurate estimate of the number of forces facing
them.
A particularly hard fight developed for Kattenau in the
centre, which was retaken by the Germans on 14 January,
though at the price of committing the 5th Panzer Division,
which was their sole operational reserve. The expenditure was
probably worthwhile, for the Russian offensive threatened to
stall after it had scarcely begun. The 3rd Belorussian Front sus-
tained nearly 80 per cent of the total Russian casualties in the
whole of the East Prussian Operation, and the delays and cost
of its initial attack were going to have far-reaching consequences
on the events on the whole Baltic flank, and indirectly on the
planned offensive against Berlin.
It was in some ways too late when Marshal Chernyakovskii
redeployed his forces and made his breakthrough. Displaying
the kind of flexibility which is too rarely credited to the Rus-
sians, he shifted all his disposable forces (the Eleventh Guards
Army and two tank corps) from behind his centre to his right,
where the Thirty-Ninth Army was making some headway in
the sector north of Schlossberg. On 20 January Chernyakovskii
finally broke through the German defences. The powerful new
striking force cruised through the gap between the Pregel and
Niemen rivers, and the line of the Niemen itself was breached
by the hitherto inactive Forty-Third Army, which sprang to life
and crossed the ice near and below Tilsit, where, 'just as we
had supposed, the Volksgrenadiers and the Volkssturm at once
streamed away to the rear in disorganised mobs, the com-
manders having ceased to exercise any control over their forces'
(Beloborodov, 1978, 356).