Which event marked the Allies meeting with strong resistance at Anzio Beach?

Operation Shingle refers to the Allied amphibious landing at Anzio Beach during World War II, which took place in January 1944. The goal of this operation was to outflank German defenses and provide a new front to relieve pressure on troops fighting in the Italian campaign. However, the Allies encountered fierce German resistance upon landing, which significantly hampered their advance and turned the operation into a protracted stalemate. This intense opposition exemplified the challenges the Allies faced in recovering from beach landings and the difficulties of advancing into Europe, highlighting the significance of Anzio Beach in the overall context of the Italian campaign.

The other events mentioned, such as The Battle of the Bulge, Operation Neptune, and The Sicilian Invasion, were notable military campaigns and operations during World War II, but they do not pertain specifically to the Anzio landing or the resultant intense resistance encountered in that scenario.