拉格罗于1741年生于法国北部的亚米安市。祖父似乎曾在巴黎经商。父亲是阿图瓦州政府的书记官,任职期间成为贵族,但并无子爵、男爵之类的爵位,其实不过是一个新的贵族,没有什么资产的地方官吏而已。拉格罗有志于当个炮兵的将校,遂入了设在法国北部的拉·菲尔炮兵学校。在大革命前,想在法国军界进阶成名,得有身分和财产。而入很少有人问津的炮兵学校,对并非大贵族家庭出身的 Laoglu was born in 1741 in the city of Amian in northern France. Grandpa seems to have been doing business in Paris. His father was a Registrar of the State of Ataturk and became an aristocrat during his tenure, but the absence of the Viscount and the Baron was in fact only a new aristocracy and a local official without any assets. Largol aspired to be an artillery school, then entered the Lafayette artillery school in northern France. Before the Great Revolution, I wanted to gain fame and fortune in the French military. Into the few art gallant school, not a noble family background