Many of the drones aren’t particularly fast or high-tech, but they are cheap enough for the Kremlin to launch more than 700 in one night, in an effort to overwhelm Ukraine’s air defenses. Here’s what we know.

The Ukrainian air force said the majority of the attack came via drones, with 574 launched by Russia. The rest of the attack involved ballistic or cruise missiles. The air force said it had shot down or suppressed 577 drones and missiles.