New Russian commander, same 'depravity and brutality': Pentagon update Day 47

Russia is moving masses of troops, armor and artillery toward eastern Ukraine.

The Pentagon has been providing daily updates on the U.S. assessment of the Russian invasion of Ukraine and Ukraine's efforts to resist.

Here are highlights of what a senior U.S. defense official told reporters Monday on Day 47:

Russia's new invasion commander

The U.S. assesses that Putin has appointed Gen. Alexander Dvornikov to lead the invasion effort. But the change in leadership can't erase the logistical and operational problems that have plagued Russian forces, according to the senior U.S. defense official.