The merrimack and the monitor changed the naval war because they engaged in the first battle between who

The Union and the Confederacy in the Civil War.

The Merrimack and the Monitor battle is referred to as the Battle of the Ironclads and is considered the most important naval battle of the Civil War and was the first meeting (in combat) if ironclad warships.

one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.

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.