Complex sentence: In 1799, the Northwest territory elected William Henry Harrison as their first delegate to Congress, and as the nation expanded, as soon as a territory was officially recognized by Congress to be properly organized, it would send a delegate, sometimes two, to Washington.
Split into simpler sentences: In 1799, the Northwest territory elected William Henry Harrison as its first delegate to Congress. As the nation expanded, when a territory was officially recognized by Congress to be properly organized, it would send a delegate, sometimes two, to Washington.