After surrounding the Goblin Main City, Zhou Tian had already attempted to issue several attack orders. However, when Zhou Tian's orders were passed down and they, the Bearman Army, started their attack, the goblins' counterattacks led to Zhou Tian paying a heavy price.
Just like during the final battle, the Goblin race took advantage of the superiority of their weapons. When Zhou Tian started his attack, they used their overwhelming firepower to suppress Zhou Tian's side. In the face of such an unbreakable assault, no matter how many troops Zhou Tian deployed, the majority ended up being slaughtered by the goblins on their way to the battlefield.
Moreover, not only the Bearmen, but when Zhou Tian personally led an attack on the Goblin Main City, he too was stopped by the goblins' defensive weapons. Although Zhou Tian wouldn't be blasted to death like the Bearmen, if he tried to forcefully break through, being seriously injured by the enemy's attack was definitely not impossible.