Zerg troops were renowned for their low cost and astounding quantity. When a sea of Zerg units swooped in roaring, their terrifying numbers and unstoppable momentum could make anyone shake in their boots.
The incessant torrent of Zerg troops rushed into Protoss territory, and a fierce tug of war between the two sides began. The military strength of both sides was being depleted at an alarming rate. The frontline was simply a tragic flesh grinder!
Finally, something shocking occurred. The remaining Photon Cannon exploded too, but the momentum of the Zerg troops had obviously waned because their numbers had severely depleted. As the saying goes, an arrow at the end of its flight could not even pierce through the thinnest of silk. The last of the Zerg died crashing into the defensive wall created by the Protoss.
The Protoss only had a few Dragoons and a crippled Zealot left, but the final result was, they had successfully defended their base.