297120
The vehicle 's early design work was based on General Dynamics ' M1 Abrams , with some noticeable differences including a combined system of hydropneumatic suspension and torsion bar s , and a river-crossing fording kit , to meet the required operational capability that was specific to combat operations in the mountainous and swampy terrain of the Korean Peninsula .
 General Dynamics
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 General Dynamics