Question: When did the Confederate capital call to the Union army?
About the article "Assassination of Abraham Lincoln", section "Original plan: Kidnapping the president".

Candidate passages:
The Confederate government did not award brevet grades to Confederate States Army officers although Confederate army regulations would have allowed them. 
Kentucky was strategic to Union victory in the Civil War.
Lincoln once said, "I think to lose Kentucky is nearly the same as to lose the whole game.
Kentucky gone, we cannot hold Missouri, nor Maryland.
These all against us, and the job on our hands is too large for us.
We would as well consent to separation at once, including the surrender of this capital" (Washington, which was surrounded by slave states: Confederate Virginia and Union-controlled Maryland).
He is further reported to have said that he "hoped" to have God on his side, but he "had" to have Kentucky.
Kentucky Governor Beriah Magoffin proposed that slave states like Kentucky should conform to the US Constitution, and remain in the Union.
When Lincoln requested 1,000,000 men to serve in the Union army, however, Magoffin, a Southern sympathizer, countered that Kentucky would "furnish no troops for the wicked purpose of subduing her sister Southern states.
"The Kentucky legislature did not vote on any bill to secede, but passed two resolutions of neutrality, issuing a neutrality proclamation May 20, 1861, asking both sides to keep out.
In elections on June 20 and August 5, 1861, Unionists won enough additional seats in the legislature to overcome any veto by the governor.
After the elections, the strongest supporters of neutrality were the Southern sympathizers.
While both sides had already been openly enlisting troops from the state, after the elections the Union army established recruitment camps within Kentucky itself.
Neutrality was broken when Confederate General Leonidas Polk occupied Columbus, Kentucky, in the summer of 1861.
In response, the Kentucky Legislature passed a resolution on September 7 directing the governor to demand the evacuation of only the Confederate forces from Kentucky soil.
Magoffin vetoed the proclamation, but the legislature overrode his veto, and Magoffin issued the proclamation.
The legislature further decided to back General Ulysses S. Grant, and his Union troops stationed in Paducah, Kentucky, on the grounds that the Confederacy voided the original pledge by entering Kentucky first.
The General Assembly soon also ordered the Union flag be raised over the state capitol in Frankfort, declaring its allegiance with the Union.
Southern sympathizers were outraged at the legislature's decisions, citing that Polk's troops in Kentucky were only en route to countering Grant's forces.
Later legislative resolutions—such as inviting Union General Robert Anderson to enroll volunteers to expel the Confederate forces, requesting the governor to call out the militia, and appointing Union General Thomas L. Crittenden in command of Kentucky forces—only incensed the Southerners further.
(Magoffin vetoed the resolutions but all were overridden.)
In 1862, the legislature passed an act to disenfranchise citizens who enlisted in the Confederate States Army.
Thus Kentucky's neutral status evolved into backing the Union.
Most of those who originally sought neutrality turned to the Union cause.
During the war, a faction known as the Russellville Convention did form a Confederate government of Kentucky, which was recognized by the Confederate States of America as a member state.
Kentucky was represented by the central star on the Confederate battle flag.
When Confederate General Albert Sidney Johnston occupied Bowling Green, Kentucky in the summer of 1861, the pro-Confederates in western and central Kentucky moved to establish a Confederate state government.
The Russellville Convention met in Logan County on November 18, 1861.
One hundred sixteen delegates from 68 counties elected to depose the current government, and create a provisional government loyal to Kentucky's new unofficial Confederate Governor George W. Johnson.
On December 10, 1861, Kentucky became the 13th state admitted to the Confederacy.
Kentucky, along with Missouri, was a state with representatives in both Congresses, and with regiments in both Union and Confederate armies.
Magoffin, still functioning as official governor in Frankfort, would not recognize the Kentucky Confederates, nor their attempts to establish a government in his state.
He continued to declare Kentucky's official status in the war was as a neutral state—even though the legislature backed the Union.
Magoffin, fed up with the party divisions within the population and legislature, announced a special session of the legislature, and then resigned his office in 1862.
Bowling Green remained occupied by the Confederates until February 1862, when General Grant moved from Missouri, through Kentucky, along the Tennessee line.
Confederate Governor Johnson fled Bowling Green with the Confederate state records, headed south, and joined Confederate forces in Tennessee.
After Johnson was killed fighting in the Battle of Shiloh, Richard Hawes was named Confederate governor.
Shortly afterwards, the Provisional Confederate Congress was adjourned on February 17, 1862, on the eve of inauguration of a permanent Congress.
However, as Union occupation henceforth dominated the state, the Kentucky Confederate government, as of 1863, existed only on paper, and its representation in the permanent congress was minimal.
It was dissolved when the Civil War ended in the spring of 1865. 
Tennessee was the last state to join the Confederacy on June 24, 1861, when Governor Isham G. Harris proclaimed “all connections by the State of Tennessee with the Federal Union dissolved, and that Tennessee is a free, independent government, free from all obligations to or connection with the Federal Government of the United States of America.” Nashville was an immediate target of Union forces.
The city's significance as a shipping port on the Cumberland River and its symbolic importance as the capital of Tennessee made it a desirable prize.
The General Assembly was in session at Nashville when Fort Donelson fell on February 16, 1862.
Soon after at the end of the month, Nashville became the first state capital to fall to the Union troops, under the command of Don Carlos Buell.
Prior to that, Nashville was evacuated and Governor made a speech recommending the citizens burn their private property; retreating troops destroyed bridges crossing the Cumberland River.
Governor Harris issued a call for the legislature to assemble at Memphis, and the executive office was moved to that city.
In the meantime President Lincoln appointed future President Andrew Johnson Military Governor of Tennessee.
He set up offices in the capitol at Nashville.
Confederate uprisings and guerrilla attacks continued sporadically in the city.
On December 2, 1864, the Confederate Army of Tennessee (not to be confused with the rival Union Army of the Tennessee) arrived south of the city and set up fortifications facing the Union Army.
After a lengthy stand-off, the Union forces attacked on December 15, starting the Battle of Nashville.
The outnumbered Confederate forces were badly defeated and retreated south to the Tennessee River.
Refugees poured into Nashville during the war, because jobs were plentiful in the depots, warehouses and hospitals serving the war effort, and furthermore the city was much safer place than the countryside.
Unionists and Confederate sympathizers both flooded in, as did free blacks and escaped slaves, and businessmen from the North.
Nashville, with its very large transient population, had flourishing red light districts.
Union wartime regulations forced prostitutes to purchase licenses and pass medical exams, primarily to protect soldiers from venereal disease.
Their trade was deregulated once military control ended.
A secret Confederate underground operated in the city, smuggling arms, medicines and information to the Confederacy, helping prisoners escape, and giving information to Confederate spies. 
When the American Civil War began in April 1861, there were only 16,000 men in the U.S. Army, and of these many Southern officers resigned and joined the Confederate States Army.
The U.S. Army consisted of ten regiments of infantry, four of artillery, two of cavalry, two of dragoons, and one of mounted infantry.
The regiments were scattered widely.
Of the 197 companies in the army, 179 occupied 79 isolated posts in the West, and the remaining 18 manned garrisons east of the Mississippi River, mostly along the Canada–United States border and on the Atlantic coast.
With the secession of the Southern states, and with this drastic shortage of men in the army, President Abraham Lincoln called on the states to raise a force of 75,000 men for three months to put down the "insurrection".
Lincoln's call forced the border states to choose sides, and four seceded, making the Confederacy eleven states strong.
The war proved to be longer and more extensive than anyone North or South had expected, and on July 22, 1861, Congress authorized a volunteer army of 500,000 men.
The call for volunteers initially was easily met by patriotic Northerners, abolitionists, and even immigrants who enlisted for a steady income and meals.
Over 10,000 Germans in New York and Pennsylvania immediately responded to Lincoln's call, and the French were also quick to volunteer.
As more men were needed, however, the number of volunteers fell and both money bounties and forced conscription had to be turned to.
Nevertheless, between April 1861 and April 1865, at least two and a half million men served in the Union Army, of whom the majority were volunteers.
It is a misconception that the South held an advantage because of the large percentage of professional officers who resigned to join the Confederate States Army.
At the start of the war, there were 824 graduates of the U.S. Military Academy on the active list; of these, 296 resigned or were dismissed, and 184 of those became Confederate officers.
Of the approximately 900 West Point graduates who were then civilians, 400 returned to the Union Army and 99 to the Confederate.
Therefore, the ratio of Union to Confederate professional officers was 642 to 283.
(One of the resigning officers was Robert E. Lee, who had initially been offered the assignment as commander of a field army to suppress the rebellion.
Lee disapproved of secession, but refused to bear arms against his native state, Virginia, and resigned to accept the position as commander of Virginia forces.
He eventually became the commander of the Confederate States Army.)
The South did have the advantage of other military colleges, such as The Citadel and Virginia Military Institute, but they produced fewer officers.
Only 26 enlisted men and non-commissioned officers are known to have left the regular United States Army to join the Confederate Army, all by desertion. 
Kentucky was a source of slaves for the cotton plantations in the lower South, and the slave trade was a very profitable business for many Kentuckians.
However, most Kentuckians did not own slaves.
Those who did were wealthy plantation owners who stood to lose a lot if slavery were abolished.
The major slave-owning areas in the state were the Bluegrass region, Henderson and Oldham counties on the Ohio River, and the western Kentucky counties of Trigg, Christian, Todd, and Warren.
Many Kentuckians from these areas joined the Confederate army.
Nevertheless, Kentucky's allegiance was divided during the Civil War.
The state was officially neutral until September 1861, when it pledged its support to the Union.
In response, a pro-Confederate Confederate government of Kentucky was formed by representatives from several Kentucky counties, with a second capital at Bowling Green.