In the TV show "Babylon 5", what ship did Captain Sheridan command before he was assigned to Babylon 5?

The EAS Agamemnon was an Earth Alliance Omega-class destroyer, named after the King who commanded the Greeks in the Trojan War.

The Agamemnon was one of the first Omega class ships to be built by Earthforce following the Earth-Minbari War.

In 2256, the Agamemnon stopped at Centauri Prime for a quick layover, before embarking on a 3 year patrol of the outer sectors. During this time, the Agamemnon patrolled around the League of Non-Aligned Worlds.

In 2259, the Agamemnon came to the aid of a supply vessel that had been attacked by hijackers. Shortly after departing, Captain John Sheridan was transferred to Babylon 5 to replace Jeffrey Sinclair as the station's commanding officer, leaving Commander James as the new Captain.

In 2260, Earth's President Clark declared martial law, his actions provoked Sheridan and others in Earthforce to go to war against him.

Sheridan commanded the fleet with the Agamemnon as his flagship during the final advance towards Earth.

During Earth's Liberation, Agamemnon engaged the automated Planetary defense grid under Clark's control and took severe damage from missiles while engaging the defense platforms. The forward guns were disabled just as the last remaining platform was preparing to target North America's eastern seaboard. Sheridan ordered the crippled Agamemnon to ram the platform to prevent it from firing. However, the EAS Apollo arrived in time to destroy the platform and prevent the destruction of the Agamemnon.