Imagine yourself imprisoned in the Warsaw Ghetto, 1942, facing the dilemma of whether or not to stand up to your Nazi persecutors. You are one of a company of Jewish actors confined there, determined to stage a play about the siege of Masada in 66BC. The siege ended in the mass suicide of the Jews defending the mountain fortress as the Roman besiegers stormed it, so it has long been a symbol of valiant Jewish resistance to persecution. A poem telling this story is said to have inspired the Warsaw uprising, and it’s upon this premise that Shuki Levy (music), David Goldsmith (lyrics) and Glenn Berenbeim (book) based this valiant musical attempt to bring the two uprisings together. Sasha Regan’s award-winning Union Theatre has a fine track record of small-scale musical revivals and it certainly succeeds better than the full-blown 2008 New London Theatre premiere.