Complex sentence: On December 19,1777, when Washington's poorly fed, ill-equipped army, weary from long marches, staggered into Valley Forge, winds blew as the 12,000 Continentals prepared for winter's fury.
Split into simpler sentences: On December 19,1777, Washington's poorly fed, ill-equipped army staggered into Valley Forge, weary from long marches. Winds blew as the 12,000 Continentals prepared for winter's fury.