No. Unless you are instituting uniforms explicitly to prevent labor organization, they are perfectly fine. However, banning pro union pins on the uniforms would

No. Unless you are instituting uniforms explicitly to prevent labor organization, they are perfectly fine. However, banning pro union pins on the uniforms would be likely illegal. Also, Soldiers are a completely different case because they are not employees. Soldiers are under the UMCJ and the constitution doesn't apply to them the same way it does to us non-soldiers. They are technically institutionalized in the same way as a patient in a psych ward.