Syria: Why didn’t Russia’s S400 missiles react at all?

1. The United States attacked the air force base outside the Russian S300 missile defense zone.

2. The Russian S300 missile has an interception distance of 135 kilometers for high-altitude targets, such as fighter jets. For small targets such as cruise missiles, the interception distance drops sharply. The Tomahawk cruise missile has a minimum flight altitude of only 50 meters, making it difficult to intercept.

3. According to Internet news, only half of the 59 cruise missiles launched by the United States hit their targets.

4. It is said that the United States notified Russia before the strike, and Russia notified Syria, so the strike only destroyed some fighter jets (all old MiG-21s, etc.). 6-7 people died. And according to convention, how could a military base only have a few people?