This interactive timeline of the war in Ukraine shows major attacks, key moments and how the battle lines have shifted in the four years since Russia's all-out invasion.

How Russia's gradual gains in the face of fierce Ukrainian opposition have affected the front line in recent months.

Russia’s so-called “special military operation” in Ukraine recently passed the four year mark. And over that time it has become the deadliest conflict on the European continent since World War II.

Russia launched its full-scale invasion of Ukraine four years ago, and the fighting continues. Here's a look at where the war stands today.