✔ 最佳答案
This is a proclamation said by Mao Zedong
军(soldier)民(all the people but solider)团结(cooperate)如(like)一(one)人(person),试(basic meaning is try, here means let)看(see)天下(the World)谁(who)能(can)敌(be an enemy).
This sentence means, just cooperation as a single spirit, there’ll be no one who still has the ability to defeat us. – A politician’s cant.