Which nation was the first to deploy tanks in combat?

Explanation

The United Kingdom was the pioneer in using tanks during warfare, first deploying them on September 15, 1916, at the Battle of the Somme. The initial tank model was the British Mark I Male, nicknamed "Little Willie." These tanks were designed to overcome trenches and barbed wire but faced challenges such as slow speed, mechanical breakdowns, difficulty traversing soft or heavily damaged terrain, and vulnerability to artillery fire. Despite these drawbacks, they caused significant fear among enemy troops and offered crucial support to infantry with their mounted machine guns and cannons.