Whakaotihia te rerenga e whai ake nei: I noho puku te Rōpū i te aroaro o nga kaupapa nui e arahi ana ki te Pakanga Tuarua o te Ao, penei i te whakakotahitanga o te Rhineland a Hitler, te nohoanga o te Sudetenland me te "Anschluss" o Austria, i aukatia e te Tiriti o Versailles. I te mea, i whakakaha anō ngā mema o te Rōpū. I te tau 1933, ka mawehe atu a Japan i te League kaua ki te tuku ki tana whakatau, pera i a Tiamana i taua tau ano (ma te whakamahi i te kore o te Huihuinga Whakakorenga o te Ao ki te whakaae ki te taurite o nga patu i waenga i a France me Tiamana hei take), Itari me Spain i te 1937. Ko te mahi nui whakamutunga o te Rōpū o te Ao ko te peia o te Soviet Union i te Hakihea 1939 i muri i te
ka whakaekea a Finland.