TANAGRA! It's a straw hat.

Erethrae, Tanagra, Plataea,Thespiae

its from star trek the next generation, picard meets this race called Tamarians and they speak in metaphores. Darmok and Jalad at Tanagra is a story about these two heroes that had to learn to trust each other so that they may work together to defeat a common foe.

The Battle on Tanagara occured in 457 BC. According to few documents, the battle lasted around 2 months.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -A--GR-. That is, seven letter words with 2nd letter A and 5th letter G and 6th letter R. In alphabetical order, they are:

maulgre

tanagra