★★★★★
1975 Spring Offensive
Beginning with the attack on Buôn Ma Thuột, North Vietnamese forces advance across the South, leading to South Vietnam's collapse on 30 April 1975.
War· Vietnam
- 1975
- 1876★★★★★
Bell's first telephone call
Three days after receiving his patent, Alexander Graham Bell makes the first successful telephone call to his assistant Thomas Watson.
Technology· United States