What type of fighting took place on the western front

trench warfare on the Western Front, both sides tried new military technology, including poison gas, aircraft, and tanks. The adoption of better tactics and the cumulative weakening of the armies in the west led to the return of mobility in 1918.

Explanation:

Western Front (World War I) - Wikipediaen.wikipedia.org › wiki › Western_Front_(World_War_I)

first second and third

explanation:

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;