John c. frémont led the during the war with mexico.

a. march on mexico city
b. raid on monterrey
c. bear flag revolt
d. siege on the alamo

John C. Frémont led the Bear Flag Revolt during the war with Mexico.

The correct answer is B. John C. Frémont led the Bear Flag Revolt during the war with Mexico.

Explanation:

When the Mexican-American War broke out in 1846, Frémont was promoted to the rank of major; shortly thereafter, on June 14, 1846, in the city of Sonoma, the American settlers encouraged by Frémont proclaimed the Republic of California, or Republic of the Bear, a supposedly independent state that lasted only 25 days before the self-proclaimed authorities of this Republic dissolved and handed over control of the territory to the United States Government that incorporated it into the American national territory.

i think it's b