To halt Preventing_or_letting the PVA advance , the 27th British Commonwealth Brigade was ordered Arranging to defend Defending the lower crossings of the Taeryong and Chongchon rivers as part of a rearguard , in conjunction with the US 24th Infantry Division further upstream on the right .

The Johnstown Flood ( locally , the Great Flood of 1889 ) occurred Coming_to_be on May 31 , 1889 , after the catastrophic failure of the South Fork Dam , located on the south fork of the Little Conemaugh River , upstream of the town of Johnstown , Pennsylvania .

However , once the Canadians had advanced Arriving , the Germans destroyed Destroying the dams upstream .