Once Putin announced the assault, it didn't take long for his military to make mistakes.
Military analysts have told Insider that Russia completely botched its initial invasion for a variety of reasons and that its campaign has been riddled with miscalculations, poor communication, and widespread confusion.
"We would have thought that they would have done a much more deliberate, well-thought-through operation. That is not what they did," Jeffrey Edmonds, a Russia expert at the Center for Naval Analyses and former CIA military analyst, told Insider in a recent interview.
During the early days of the war, Russian forces were expected to combine air support with a ground assault and advance with large groups of artillery, armor, and troops.
Instead of leading with a substantial air campaign and gaining superiority over Ukraine, Russian commanders just instructed their troops to drive to Kyiv. They quickly faced logistical headaches, isolation, and ambushes.
"The Kremlin simply miscalculated and expected the Ukrainian military to collapse far quicker than it has," Mason Clark, the lead Russia analyst at the Institute for the Study of War, told Insider in February, adding that it "led to a lot of dumb Russian mistakes."