What are some Disadvantages of World War 1 tanks?

World War I tanks had several disadvantages, including their limited speed and mobility, often struggling to traverse difficult terrain and mud. Many early models were mechanically unreliable, frequently breaking down in combat or becoming stuck. Additionally, their armor, while innovative, could still be penetrated by artillery, and the tanks were vulnerable to infantry anti-tank weapons. The coordination between tanks and infantry was also often lacking, reducing their overall effectiveness on the battlefield.