Final answer:
The western front of the war was considered a stalemate due to advanced military technology, the construction of extensive trench networks, and the war of attrition strategy.
Step-by-step explanation:
The western front of the war was considered to be a virtual stalemate due to several reasons. First, the introduction of advanced military technology, such as machine guns and artillery, made it difficult for either side to overrun the other's trenches. The lack of effective tactics to counter these defensive fortifications resulted in a deadlock on the western front.
Second, both sides engaged in a race to outflank the other's trenches, leading to the construction of extensive networks of trenches. When both sides reached the English Channel with no more room to maneuver, a stalemate ensued.
Finally, the war of attrition strategy employed by both sides, involving mass artillery bombardments and futile frontal assaults, further contributed to the stalemate on the western front.