The best replacement for usmc is army.

The best alternatives to usmc are rated as following:
★★★★★  army
★★★★  us army
★★  usaf
★★  royal marines
★★  aclu
★  army infantry
★  british army
★  ufc
  ffl
  russian marines
  lasd
  rmc
  uscg
  marines

Your alternative for usmc is not listed? Suggest!
Speaking about usmc, one probably shouldn't forget about ufc.

Other search terms related to usmc and their ratings are:
★★★★★ ufc
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usmc
army
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