Complex sentence: At 9:45 a.m. on June 10, a brigade of Benjamin H. Grierson's Union cavalry division reached Brice's Crossroads and the battle started at 10:30 a.m. when the Confederates performed a stalling operation with a brigade of their own.
Split into simpler sentences: At 9:45 a.m. on June 10, a brigade of Benjamin H. Grierson's Union cavalry division reached Brice's Crossroads. The battle started at 10:30 a.m. when the Confederates performed a stalling operation with a brigade of their own.