(i) The poet is probably speaking about the uniforms that the soldiers wear at the time war. The work “uniform” here could also mean the traditioanl dresses of a country
(ii) The poet suggests that all people on earth are the same as they breathe, buried, wake, sleep, hate, love and labour. The importance of the sun and air and water is equal for everyone. Everyone needs peace and suffers from starvation during wars.