Can you provide a link to that claim ?
Was you misquoting this ?
“I will never send our finest into battle unless necessary, and I mean absolutely necessary, and will only do so if we have a plan for victory with a capital V,” he thundered. “The world must know that we do not go abroad in search of enemies.”
https://www.vox.com/world/2017/8/25/16185936/trump-america-first-afghanistan-war-troops-iraq-generals