The definition of symbiosis has varied among scientists. Some advocated that the term symbiosis should only refer to persistent mutualisms, while others thought it should apply to any type of persistent biological interaction (in other words mutualistic, commensalistic, or parasitic).
The League of Nations failed for a couple of reasons: 1  The United States was not part of it. 2  More importantly, the countries in the League did not take the idea of collective security seriously.3  When countries attacked others, nothing was done. 4  For example, Italy attacked Ethiopia and Japan attacked China. The United States was not part of it. 2  More importantly, the countries in the League did not take the idea of collective security seriously. 3  When countries attacked others, nothing was done. 4  For example, Italy attacked Ethiopia and Japan attacked China. 5  In both cases, nothing serious was done.
Ethiopia wins the battle of Adwa. On this date in 1896, Ethiopia defeated the Italian colonial army in the Battle of Adwa. This victory signaled the decline of European colonialism in Black Africa. When Black African Menelik II came to the Ethiopian throne in 1889, the Italians thought that he would surrender power to them because they had been supplying him with arms.