7th army and panzer group guderian managed to at last connect their frontlines on 19 june 1940, when the two units met at la chapelle, to the northeast of belfort. a number of french forts were conquered, including the rupt-sur-moselle, which was captured by 2nd panzer division. guderian planned to have the troops advance into the vosges region on a wide front, but was met with infrastructural issues when large amounts of german infantrymen of i army corps also entered the operational area. to prevent overcrowded roads, he sent an envoy to von leeb to better coordinate the advance together with i army corps.