What are three new things that Percy learns about Annabeth's background

Daughter of Athena
Her mother hates his father
And that she’s been at camp half blood since she was seven.

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict