Military author Bing West explains that American generals have no confidence that President Obama will make any serious effort to win the war against ISIS. For that reason, they opposes sending US advisors and forward observers into combat, fearing that Obama would simply be putting them at risk with no chance of gain.
"Obama lacks a credible policy to support Sunni warriors and leadership backed by U.S. firepower. Our generals are rightly reluctant to avoid commitment in the absence of an achievable political end state and public support. A tactic is not a substitute for a strategy."
https://www.washingtonpost.com/opinions/why-us-generals-dont-want-advise...
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