I.together [美 təˈɡɛðər, 英 təˈɡɛðə]副together often appears as the second element of certain verb structures in English (band together, go together, piece together, etc). For translations, see the relevant verb entry (band, go, piece, etc).
Men in battle who become fearful tend to bunch together and the shell casings indicate the men on the ridge fell back and this "bunching" started to occur.
The colors correspond to the initial, tiny density fluctuations imprinted on the sheet initially, which tell it where to stretch out (blue), and where to bunch together and fold (red).
If a protein misfolds, either spontaneously or after experiencing stress, the inner hydrophobic segments can be exposed to the exterior causing misfolded proteins to bunch together to form aggregates.