A Grand Company is a combat unit within the Iron Warriors Legion. In the time of the Great Crusade and Horus Heresy, they were the second-most important formation type in the Legion, ranking below the Grand Battalion. Grand Companies of this period, alternatively called "Cohorts", were heavily mechanised and composed of three to five Space Marine companies as well as support forces composed of regular human auxiliaries as well as Mechanicum contingents.

大连是钢铁勇士军团中的一个战斗单位。在大远征和荷鲁斯叛乱时期，他们是军团中第二重要的编队类型，仅次于大营。这一时期的大连，也被称为“大队”，是高度机械化的，由三到五个星际战士连队以及由常规人类辅助军和机械教特遣队组成的支援部队组成。

Following the Horus Heresy, Iron Warriors Grand Companies became warbands which resembled Space Marine Chapters. They would be usually led by a Warsmith and be composed of several regular companies commanded by Captains. The number of companies that will be part of the Grand Company will vary, depending on both the number of Chaos Space Marines in the Grand Company, and if the Grand Company has been able to absorb any other Grand Companies (usually by virtue of killing a rival Warsmith).

在荷鲁斯叛乱之后，钢铁勇士大连变成了类似于星际战士战团的战帮。他们通常由一名战争铁匠领导，由连长指挥的几个正规连队组成。将成为大连一部分的连队的数量有所不同，这取决于大连中混沌星际战士的数量，以及大连是否能够吸收任何其他大连（通常是通过杀死竞争对手战争铁匠）。

Known Grand Companies 已知大连

• Third Grand Company 第三大连

• 5th Grand Company 第五大连

• 7th Grand Company ("7th Assault Cohort")

• 第七大连（“第七突击大队”）

• 11th Grand Company 第11大连

• 14th Grand Company 第14大连

• 16th Grand Company 第16大连

• 23rd Grand Company 第23大连

• 33rd Grand Company 第33大连

• 59th Grand Company 第59大连

• 126th Grand Company 第126大连

• 134th Grand Company 第134大连