What did Germany, Italy, and Japan do to “test the will” of the League of Nations

Germany sent troops to Austria and annexed Alsas and Loraine regions from France, moreover, they began to expand their military capabilities against the treaty of Versailles.

Italy, under the leadership of Benito Mussolini, invaded Abyssinia. Today, this is what we call Ethiopia.

Japan, against the laws invaded Manchuria and started committing atrocities and mass war crimes in China.

However, League of Nation were not able to take any effective actions against these acts committed by Germany, Italy and Japan.  

Explanation:

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

president thomas jefferson hoped that the embargo act of 1807 would the united states by demonstrating to britain and france their dependence on american goods, convincing them to respect american neutrality and stop impressing american seamen. instead, the act had a devastating effect on american trade.