The rapid collapse of Afghan National Defense and Security Forces (ANDSF) in August 2021 was widely anticipated and due to its structural constraints and qualitative decline from 2018–21. This article provides a targeted analysis of ANDSF operational liabilities and qualitative limitations, referencing often overlooked statements by US and Afghan political and military officials, data from official US government reports, and prescient NGO field analyses. The painful ANDSF experience illuminates several principles that must be considered as US policymakers turn toward security force assistance for proxy and surrogate military forces in conflict with the partners of America’s emerging great-power geostrategic competitors—China and Russia.

Deference to Chinese aspirations in Eurasia is integral to Moscow’s pursuit of closer relations with Beijing. Yet China’s pursuit of regional, and ultimately global, influence is at odds with Russia’s longstanding ambition to maintain post-Soviet Eurasia as a strategic glacis and sphere of ‘privileged interests’. Russia has consequently sought to shape and channel Chinese engagement in line with its own interests, with mixed results. Disappointments with the effects of Chinese economic and political influence on Russian equities, limits on Sino–Russian coordination, and the interest of Eurasia’s smaller states contributed to a growing wariness on Russia’s part. The 2022 invasion of Ukraine and attendant confrontation with the West have left Russia more dependent on China, even as China itself has become more realistic about the prospects for Eurasian integration.

The rapid collapse of Afghan National Security and Defense Forces (ANDSF) in August 2021 was widely anticipated and due to its structural constraints and qualitative decline from 2018–21. This article provides a targeted analysis of ANDSF operational liabilities and qualitative limitations, referencing often overlooked statements by US and Afghan political and military officials, data from official US government reports, and prescient NGO field analyses. The painful ANDSF experience illuminates several principles that must be considered as US policymakers turn toward security force assistance for proxy and surrogate military forces in conflict with the partners of America’s emerging Great Power geostrategic competitors— China and Russia.

The key question moving forward is how to prevent China from making a more aggressive posture against Taiwan the new normal. More frequent Chinese exercises and incursions close to Taiwan should be monitored and, if necessary, thwarted, countered, or disrupted. If Chinese exercises involve military aircraft venturing into Taiwan’s airspace, for example, Taipei and Washington should consider measures to warn or intercept the Chinese planes. In response to the threat of a quarantine or blockade, Taipei needs to invest in appropriate capabilities and increase stockpiles of critical resources. Finally, larger, more frequent Chinese exercises around Taiwan would make determining China’s intentions more difficult. The United States and Taiwan should refine their approach to strategic warning, identifying indicators that can differentiate between a Chinese military exercise and preparations for an actual attack.