Dear Daniya,

You can go through this paper that highlights the origin of operations research.

http://pubsonline.informs.org/doi/pdf/10.1287/opre.32.2.465.

There is a book that can better serve your purpose. However, this book seems unavailable on Amazon.com

http://www.amazon.com/History-Development-Operations-Research-Management/dp/0387466207

Hope you can find the book anyhow.

Regards,

Ali Syed

Britannica is a good reference to start: 

http://www.britannica.com/topic/operations-research#ref22348

If you need more material, these are useful sources for you:

Saul I. Gass, Arjang A. Assad, An Annotated Timeline of Operations Research: An Informal History. New York, Kluwer Academic Publishers, 2005.

Saul I. Gass (Editor), Arjang A. Assad (Editor), Profiles in Operations Research: Pioneers and Innovators. Springer, 2011

Maurice W. Kirby, Operational Research in War and Peace, World Scientific, London, 2003

J. K. Lenstra, A. H. G. Rinnooy Kan, A. Schrijver (editors) History of Mathematical Programming: A Collection of Personal Reminiscences, North-Holland, 1991

Charles W. McArthur, Operations Analysis in the U.S. Army Eighth Air Force in World War II, History of Mathematics, Vol. 4, Providence, American Mathematical Society, 1990

C. H. Waddington, O. R. in World War 2: Operational Research Against the U-boat, London, Elek Science, 1973.

Stories about Maxima and Minima

V. M. Tikhomirov, Moscow State University, Russia

"An annotated timeline of operations research: An informal history" by Saul I. Gass and Arjang A. Assad

Is also an interested book

Hello! The website by Werner Ulrich containts very interesting stories about one of the OR pioneers C. West Churchman. http://wulrich.com/cwc.html