Arnold moved his base of operations to Portsmouth and was later joined by troops under General William Phillips. Phillips led an expedition that destroyed military and economic targets, against ineffectual militia resistance. The state's defenses, led by General Baron von Steuben, put up resistance in the April 1781 Battle of Blandford, but were forced to retreat. The French General Lafayette and his forces arrived to help defend Virginia, and though outnumbered, engaged British forces under General Charles Cornwallis in a series of skirmishes to help reduce their effectiveness. Cornwallis dispatched two smaller missions under Colonel John Graves Simcoe and Colonel Banastre Tarleton to march on Charlottesville and capture Gov. Jefferson and the legislature, though was foiled when Jack Jouett rode to warn Virginia government.