dispense with

Liberman made his first impression as an art director in the early nineteen-thirties at VU, the French weekly magazine whose innovative use of photography anticipated Life and Paris Match by nearly a decade. A portfolio of VU’s high-impact covers, with their dynamic use of type and photography, establishes Liberman’s roots in the graphic avant-garde. All that ended with the German invasion. Along with Tatiana’s daughter Francine du Plessix (who provides occasional brief but incisive commentary here), the couple left occupied France in 1941 and settled in New York, where they both had early and sustained success. Condé Nast hired Liberman for the art department at Vogue, and within a year he was the magazine’s art director. Tatiana became a fashionable designer of hats for society women at Saks Fifth Avenue. They married in 1942 and, despite infidelities, never separated.

Churchward dispenses with most of this history in an early chapter,and tracks Liberman’s rapid rise through the ranks at Condé Nast alongside his career as an artist.

What does the first sentence mean in the second paragraph? "Churchward dispenses with most of this history in an early chapter", I think the phrase is the keyword. Could you explain for me?