主题：从围棋类比下中美斗法 -- 田昭明

（1）United States Budgetary Costs and Obligations of Post-9/11 Wars through FY2020: $6.4 Trillion

作者：Neta C. Crawford

发表：November 13, 2019

摘要： Since late 2001, the United States has appropriated and is obligated to spend an estimated $6.4 Trillion through Fiscal Year 2020 in budgetary costs related to and caused by the post-9/11 wars — an estimated $5.4 Trillion in appropriations in current dollars and an additional minimum of $1 Trillion for US obligations to care for the veterans of these wars through the next several decades.

Total estimated appropriations for the Afghanistan and Pakistan war by the DOD and State Department are about $978 billion from FY2001 through FY 2020.

链接：“https://watson.brown.edu/costsofwar/files/cow/imce/papers/2019/US Budgetary Costs of Wars November 2019.pdf”

（2）Afghanistan War Cost, Timeline, and Economic Impact

作者：Kimberly Amadeo

编辑：Michael J Boyle

日期：February 23, 2021

链接：https://www.thebalance.com/cost-of-afghanistan-war-timeline-economic-impact-4122493