following the mexican-american war, which issue broke party unity and divided congress largely along sectional lines?

a. the necessity of making the gadsden purchase

b. the status of disputed land grants in texas

c. the annexation of california and new mexico

d. the extension of slavery into territories acquired from mexico

the extension of slavery

Explanation:

eroupe is a great mideval place and alot of wars went on alao

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.