Process the following text and classify it into one of these two topics: history or science
The P-51 Mustang is a long-range single-seat fighter aircraft that was used during World War II and the Korean War.
The topic of the given text is history.
Complete the following task based on the instruction and optional input provided.### Instruction:
Process the following text and classify it into one of these two topics: history or science

### Input:
The P-51 Mustang is a long-range single-seat fighter aircraft that was used during World War II and the Korean War.

### Output:
The topic of the given text is history.