The Western Front barely moved throughout World War I because the major method of warfare during World War I was called trench warfare. Trench warfare was essentially digging into positions and defending them from attackers. There were major advancements made in weaponry such as machine guns at this time, but there were not similar advancements in the mobility of weaponry. Therefore, forces simply dug in and defended positions without making much movement at all.
Maybe because of all of the ditches
The Western Front's minimal movement during World War I was mainly due to trench warfare, where both sides dug in and defended their positions. The use of advanced weaponry and the resulting high casualty rates made offensives costly and often ineffective. This led to a prolonged stalemate, with only minor territorial changes despite numerous battles.
;