An Engineer Combat Battalion (ECB) was a designation for a battalion-strength combat engineer unit in the U.S. Army, most prevalent during World War II. They are a component of the United States Army Corps of Engineers.
Combat Engineers ferried infantry and special forces troops in craft such as this M2 assault boat at Dornot-Corny, Lorraine in World War II
Infantry support bridge over the Saar River erected by 289th Combat Engineers at Volklingen, Germany
1269th engineers attached to the technology-capturing T-Force of the Alsos Mission dismantle a nuclear pile built by German scientists in Haigerloch, Germany, April 1945
The 2nd Engineer Battalion is an engineer battalion in the United States Army which can trace its lineage back to 1861.