Answer
The Battle of Embudo Pass, in which Slack participated, was a crucial engagement during the Mexican-American War. Fought on December 25, 1846, near Santa Fe, New Mexico, the American forces led by Colonel Stephen Watts Kearny clashed with Mexican troops under the command of General Diego Archuleta. This significant encounter secured American control over the province of New Mexico and paved the way for further advancements in the conflict.