 The 502nd Engineer Company became the first V Corps company @-@ sized unit to return for a second tour in Iraq when it deployed in September 2004 . The company returned to Hanau in September 2005 . In December 2004 , the 130th Engineer Brigade 's headquarters was informed that it would be deployed back to Iraq the next year . The brigade mobilized and began this new deployment in September 2005 ; it began operating in the country the next month . The 54th Engineer Battalion followed in October . The brigade eventually replaced the 130th , <unk> , and 20th Engineer Brigades , becoming the only engineer brigade operating in the country . By December 2006 , the brigade commanded all engineering formations in Multi @-@ National Corps - Iraq , including engineers from other branches of the US Military , for a total of 3 @,@ 300 soldiers . During the tour they were supported by the <unk> Engineer Command . 
