How did mutinies (or rebellions) affect the French and Russian armies?

Russian military sub units invaded Germany and Austria-Hungary. After some initial success, the Russians were reinforced and by 1915 had lost near about 1.5 million militants. By 1916, the Russian Army was deteriorating. In February 1917, a revolution over balanced the government. In October, another revolution led to a Communist government and Russia's complete withdrawal from the war.

Explanation:

Early in 1917, a new French Army chief commander, General R. Nivelle, planned a major offensive on the German lines. His strategy was quite different and he tried to soften the German defenses with large guns and then with the tanks and large numbers of militants at the enemy.

Nivelle suspected that a 'break-through' would occur within 2 days. This would then lead to a defeat of the German Army and an end to the war. Then French soldiers left their track open to attack across field.