Maize, beans, and rice are the main source of calories and protein in the diet in El Salvador. In times of acute stress, sorghum may also be consumed. Maize, beans, and sorghum are produced by smallholders and larger farmers in the country, but rice is almost entirely imported. Central Market at Gerardo Barrios in San Salvador, the capital city, serves both as the principal market in the country and as a regional market which can influence prices in Guatemala, Honduras, and Nicaragua. Santa Ana and Ahuachapan are important markets in the West with strong trade connections to Guatemala. La Union is an important regional market in the East with strong trade connections to Honduras and Nicaragua. San Miguel, Usulután, and San Vincente are important regional markets and major assembly markets for domestically produced maize and beans. In the east, Santa Ana and Ahuachapan are important markets for trade with Guatemala.