Offered to buy california and new mexico but was rejected by mexico

U.S President James Polk offered to buy California and New Mexico before the mexican american war, but his offered was rejected by the Mexican government.

norsemen from northern countries had made earlier journeys

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.