<p>　　This two-part drama documentary tells the epic story of the Allies’ finest hour - and the invention of modern warfare. The first episode, The Spring Offensive, begins in early 1918, at a moment of maximum jeopardy for the Allies. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　In the famous words of Field Marshal Haig, they had their &quot;backs to the wall&quot; as a great German attack swept westward in a final bid to win the bloodi...</p>