german combat efficiency decay, eastern front.
100%efficient 1941 (early operation barborossa victories with blitzkreig veterans)
82% efficient 1942 (lots of trouble at Stalingrad, Battle of Moscow. Loss of many Blitzkreig veterans)
87% efficient 1943 (new, more powerful weapons like the panther, panzer IV G, wide issue of MG42/MP40, STG43 is built. The kharkov vicotory,kursk offensive, tactically successful but strategic failure. The strategic initiative passes to the Soviets in the second half of the year.
72% efficient 1944 ( Massive losses by Soviet operation Bagration in the first half and soviet capture of Rumania later on)
63% efficient 1945 ( The war is lost. only old men and young boys left.)
Its interesting to point out that the german war machine essentially started dying after the first year, with all the professional veteren troops dying in Russia. the 1943 generation, while well trained, was not as well trained as the german soldiers of 1939-1941.
However, after kursk, training levels dropped immensly in early 1944 after successful soviet operations
The last year saw mostly badly trained old men and boys (in comparison to the 1st generation troops) men who were led by veteren officers. the german men of ages 20s to 30s were essentially either fighting or dead months, years ago.