The Republican forces were made up of assorted factions (Communists, Socialists, Anarchists, to name a few) with wildly differing approaches to government and eventual aims, but a common opposition to the Nationalists. The Nationalists, led by General Francisco Franco, were also factionalized but to a lesser extent. They sought a return to the golden days of Spain, based on law, order, and traditional Catholic family values.[10]
At about 16:30 on Monday, 26 April 1937, warplanes of the German Condor Legion, commanded by Colonel Wolfram von Richthofen, bombed Guernica for about two hours. Germany, at this time led by Hitler, had lent material support to the Nationalists and were using the war as an opportunity to test out new weapons and tactics. Later, intense aerial bombardment became a crucial preliminary step in the Blitzkrieg tactic.[6][9]
In his journal for 30 April 1937, von Richthofen wrote:
When the first Junker squadron arrived, there was smoke already everywhere (from the VB [VB/88] which had attacked with 3 aircraft); nobody would identify the targets of roads, bridge, and suburb, and so they just dropped everything right into the center. The 250s toppled a number of houses and destroyed the water mains. The incendiaries now could spread and become effective. The materials of the houses: tile roofs, wooden porches, and half-timbering resulted in complete annihilation. Most inhabitants were away because of a holiday; a majority of the rest left town immediately at the beginning [of the bombardment]. A small number perished in shelters that were hit."[11]
This account contains striking discrepancies from other accounts that state that the town's inhabitants were in fact congregated in the center of town,