English invasion of Scotland (1400) Edinburgh) where it could maintain contact with its supply fleet. The campaign ultimately accomplished little except to further deplete the king's coffers, and is historically notable only for being the last one led by an English king on Scottish soil. War with Scotland had started under Edward I, cross-border raids and fighting had been the norm in Anglo-Scottish relations since the 1370s, generally in the form of Scottish incursions over the border and English attempts to repel them. The 1399 revolution, which eventually deposed Richard II, created further opportunity for Scotland to regain the land between the River Tweed and
Course of the Colorado River of this water is used for irrigation in the Mexicali Valley, one of Mexico's most fertile agricultural regions. Below the Morelos Dam the Colorado forms the international border for a short distance, between Baja California and Arizona, before reaching the Southern International Boundary at San Luis Rio Colorado, where it crosses entirely into Mexico. For the remainder of its course to the Gulf, the river forms the boundary between Baja California (west) and Sonora (east). "River", however, is a misnomer as the Colorado is dry or small stream most of the year, due to its flow being almost completely exhausted