At 4:15 on the morning of 9 April 1940, German forces crossed the border into neutral Denmark. In a coordinated operation, German ships began disembarking troops at the docks in Copenhagen. Although outnumbered and poorly equipped, soldiers in several parts of the country offered resistance; most notably the Royal Guard in Copenhagen and units in South Jutland. At the same time as the border crossing, German planes dropped the notorious leaflets over Copenhagen calling for Danes to accept the German occupation peacefully, and claiming that Germany had occupied Denmark in order to protect it against Great Britain and France. Colonel Lunding from the Danish army's intelligence office later confirmed that Danish intelligence knew the attack would be coming on either 8 or 9 April and had warned the government accordingly. The Danish ambassador to Germany, Herluf Zahle, issued a similar warning which was also ignored.