How did they have enough time to dig the trenches?

The time required to dig trenches often depended on several factors, including the scale of the operation, the number of personnel involved, and the urgency of military needs. Soldiers were trained to excavate quickly and efficiently, utilizing tools like shovels and pickaxes. Additionally, the use of machinery and the prioritization of certain areas for trench digging allowed them to complete these tasks more rapidly. In many cases, trenches were dug during lulls in fighting or as part of a strategic preparation for upcoming battles.