Forming an alliance is read as recognising that a goal needs more than one pair of hands. Dream books see it as finding common cause — with others, or between parts of yourself that usually compete.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.