On Jan. 29, 1861, Kansas entered the Union as the 34th state.

On Jan. 29, 1861, Kansas entered the Union as the 34th state.

To honor Kansas' 152nd birthday, the Butler County History Center and Kansas Oil Museum, located at 383 E. Central, will host a birthday party for the state from 1 to 3 p.m. Saturday.

Cost is regular admission, which is $4 for adults, $3 for seniors over 65 and $2 for students ages 6-18.

Members and children under 5 will be admitted at no charge.

In addition to museum tours, there will be children's activities and refreshments.

Kansas' entrance into the Union was not a calm one. In 1854, the Kansas Territory was formed thanks to the Kansas-Nebraska Act.

To appease Southern interests, Illinois Senator Stephen Douglas inserted into the Kansas-Nebraska Act a provision for "popular sovereignty."

This meant the settlers would choose whether Kansas would be a free state or a slave state. Pro-slavery and anti-slavery settlers soon descended on the territory.

A tumultuous, bloody seven-year struggle ensued before the abolitionists finally prevailed.

Several months after Kansas was admitted to the Union as a free state, the Civil War officially began with the attack on Fort Sumter on April 12, 1861.