What does the Tongan shield represent?

http://www.ngw.nl/heraldrywiki/index.php?title=Tonga The arms were designed in 1862 by Prince Uelongatoni Ngu Tupou and are identical to the Royal arms. read more

Quarterly; first, Or, three mullets of six points argent; second, Gules, the Royal Crown of Tonga proper; third, Azure a dove volant argent holding an olive branch vert; fourth Or, three swords in fret argent; overall, a mullet of six points argent charged with a cross couped gules. read more

Larger Tonga flag Tonga Coat of Arms: The coat of arms of Tonga was adopted in 1875, and features a large shield divided into four quarters. The Royal Crown of Tonga is displayed in the top-right quadrant, the top-left contains three stars, the bottom-left a dove holding an olive branch, and in the bottom-right are three crossed swords. read more