What US embassy was abandoned on April 12th, 1975
Phnom Penh was abandoned after being besieged by the Khmer Rouge on April 12th 1975
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What US embassy was abandoned on April 12th, 1975
### Input: 
### Response: Phnom Penh was abandoned after being besieged by the Khmer Rouge on April 12th 1975