user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: Who served in the 21st Illinois Volunteer Infantry Regiment that also fought in the battle of Vicksburg? 
Knowledge Triplets: Capture of New Orleans, base.americancivilwar.battle.military_units_involved_in_this_conflict, 22nd Louisiana Infantry Regiment
Vicksburg, location.capital_of_administrative_division.capital_of, m.0jvvyr2
23rd Louisiana Infantry Regiment, common.topic.notable_types, Military unit
John S. Bowen, common.topic.image, GenJohnBowen
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 31st Louisiana Infantry Regiment
Battle of Chancellorsville, base.culturalevent.event.entity_involved, Robert E. Lee
John Alexander McClernand, military.military_person.participated_in_conflicts, Siege of Vicksburg
m.04h_h95, military.military_person.service, Ulysses S. Grant
Illinois, common.topic.notable_for, g.1255ny7mn
Siege of Vicksburg, military.military_conflict.combatants, m.049y2pc
Siege of Vicksburg, common.topic.image, Battle of Vicksburg, Kurz and Allison
Western Theater of the American Civil War, base.americancivilwar.theater.campaigns, Grant's Operations Against Vicksburg
William F. Draper, military.military_person.participated_in_conflicts, Siege of Vicksburg
Vicksburg, location.location.containedby, Mississippi
Illinois, common.topic.webpage, m.09wtmzk
17th Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
27th Louisiana Infantry Regiment, common.topic.notable_types, Military unit
Battle of Chickasaw Bayou, base.americancivilwar.battle.military_units_involved_in_this_conflict, 22nd Louisiana Infantry Regiment
Robert E. Lee, military.military_commander.military_commands, m.0dl56tp
Illinois, common.topic.webpage, m.09y6q5w
Vicksburg, location.location.events, Battle of Chickasaw Bayou
Battle of Goodrich's Landing, time.event.included_in_event, Grant's Operations Against Vicksburg
James B. McPherson, military.military_person.service, m.04yv_v3
William F. Draper, military.military_person.participated_in_conflicts, American Civil War
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Goodrich's Landing
Battle of Fort Donelson, military.military_conflict.military_personnel_involved, John Alexander McClernand
22nd Louisiana Infantry Regiment, common.topic.notable_types, Military unit
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 23rd Louisiana Infantry Regiment
m.09yh7gb, common.webpage.topic, Illinois
Siege of Vicksburg, base.culturalevent.event.entity_involved, Union
Carter L. Stevenson, common.topic.article, m.0dvc35
Henry Wilson, military.military_person.participated_in_conflicts, American Civil War
m.09yw15r, common.webpage.topic, Illinois
26th Louisiana Infantry Regiment, common.topic.notable_types, Military unit
Confederate States of America, military.military_combatant.casualties, m.0gmkgpk
David Farragut, common.topic.notable_for, g.1255_srjt
3rd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Iuka
m.09x0mns, common.webpage.topic, Illinois
22nd Louisiana Infantry Regiment, military.military_unit.place_of_origin, Louisiana
Siege of Vicksburg, military.military_conflict.military_personnel_involved, Carter L. Stevenson
Ralph Pomeroy Buckland, military.military_person.service, m.08ctt32
m.0gmkfgp, military.casualties.combatant, Confederate States of America
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Grand Gulf
Jefferson Davis, military.military_person.participated_in_conflicts, Battle of Monterrey
Battle of Grand Gulf, time.event.included_in_event, Grant's Operations Against Vicksburg
23rd Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
Joseph E. Johnston, military.military_person.participated_in_conflicts, Battle of Chapultepec
Siege of Vicksburg, military.military_conflict.commanders, m.049y2m5
Battle of Chancellorsville, military.military_conflict.military_personnel_involved, Robert E. Lee
27th Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
22nd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
Carter L. Stevenson, military.military_person.participated_in_conflicts, American Civil War
Vicksburg, location.location.containedby, United States of America
21st Illinois Volunteer Infantry Regiment, military.military_unit.servicemembers, m.04h_h95
Grant's Operations Against Vicksburg, time.event.includes_event, Siege of Vicksburg
Siege of Vicksburg, military.military_conflict.military_personnel_involved, John Alexander McClernand
31st Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Chickasaw Bayou
Peter Joseph Osterhaus, common.topic.article, m.03grvlq
Vicksburg, book.written_work.original_language, English Language
William D. Turner, military.military_person.participated_in_conflicts, Siege of Vicksburg
Siege of Vicksburg, military.military_conflict.military_personnel_involved, Peter Joseph Osterhaus
Regiment, common.topic.notable_for, g.125fblfvd
Siege of Vicksburg, military.military_conflict.military_personnel_involved, Seth Barton
21st Illinois Volunteer Infantry Regiment, military.military_unit.place_of_origin, Illinois
31st Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
Second Battle of Corinth, base.americancivilwar.battle.military_units_involved_in_this_conflict, 3rd Louisiana Infantry Regiment
David Farragut, military.military_person.participated_in_conflicts, Siege of Vicksburg
John C. Pemberton, military.military_person.service, m.08cqtg6
Battle of Champion Hill, time.event.included_in_event, Grant's Operations Against Vicksburg
21st Illinois Volunteer Infantry Regiment, military.military_unit.unit_size, Regiment
Western Theater of the American Civil War, time.event.includes_event, Vicksburg Campaign
m.0bmz024, military.military_command.military_commander, Winfield Scott
Illinois, common.topic.image, seal.gif
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Big Black River Bridge
Battle of Iuka, base.americancivilwar.battle.military_units_involved_in_this_conflict, 3rd Louisiana Infantry Regiment
Ralph Pomeroy Buckland, common.topic.article, m.02rm2sn
26th Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
29th Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
John Alexander McClernand, common.topic.article, m.059w59
Siege of Vicksburg, military.military_conflict.military_personnel_involved, Ulysses S. Grant
Ralph Pomeroy Buckland, military.military_person.participated_in_conflicts, Siege of Vicksburg
James B. McPherson, common.topic.article, m.02fl29
31st Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Stirling's Plantation
William D. Turner, military.military_person.service, m.0z8pndg
Illinois, common.topic.webpage, m.09ysbrm
Battle of Wilson's Creek, base.americancivilwar.battle.military_units_involved_in_this_conflict, 3rd Louisiana Infantry Regiment
3rd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Pea Ridge
17th Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
Vicksburg, location.hud_county_place.county, Warren County
27th Louisiana Infantry Regiment, military.military_unit.place_of_origin, Louisiana
m.04lstq9, common.webpage.topic, Illinois
22nd Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
m.09ysbrm, common.webpage.topic, Illinois
John Alexander McClernand, military.military_person.participated_in_conflicts, Battle of Fort Donelson
William D. Turner, common.topic.notable_for, g.1yh9t12d5
George B. McClellan, military.military_person.participated_in_conflicts, Mexican–American War
John S. Bowen, military.military_person.participated_in_conflicts, Battle of Big Black River Bridge
John Alexander McClernand, common.topic.image, John Alexander McClernand
m.049y352, military.military_command.military_commander, Robert E. Lee
29th Louisiana Infantry Regiment, common.topic.notable_types, Military unit
m.04yxf4y, military.military_command.military_commander, Robert E. Lee
Peter Joseph Osterhaus, military.military_person.participated_in_conflicts, Battle of Big Black River Bridge
31st Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
War of 1812, base.culturalevent.event.entity_involved, Winfield Scott
Battle of Fort Donelson, military.military_conflict.military_personnel_involved, James B. McPherson
Peter Joseph Osterhaus, people.deceased_person.place_of_death, Duisburg
Siege of Vicksburg, military.military_conflict.military_personnel_involved, Henry Casey
23rd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Capture of New Orleans
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 26th Louisiana Infantry Regiment
Carter L. Stevenson, military.military_person.participated_in_conflicts, Battle of Nashville
Ralph Pomeroy Buckland, military.military_person.participated_in_conflicts, Battle of Shiloh
John Alexander McClernand, military.military_person.participated_in_conflicts, Battle of Shiloh
William F. Draper, common.topic.article, m.02rj_fv
Battle of Vicksburg, Kurz and Allison, common.image.size, m.02c7z_m
17th Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
Battle of Vicksburg, Kurz and Allison, common.image.appears_in_topic_gallery, Siege of Vicksburg
3rd Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
Robert E. Lee, military.military_person.participated_in_conflicts, American Civil War
James B. McPherson, military.military_person.participated_in_conflicts, Battle of Resaca
Illinois, common.topic.webpage, m.0b45xgk
m.049y372, military.military_command.military_commander, Robert E. Lee
Robert E. Lee, military.military_commander.military_commands, m.0c058rz
Siege of Vicksburg, military.military_conflict.military_personnel_involved, Henry Dow
Capture of New Orleans, base.americancivilwar.battle.military_units_involved_in_this_conflict, 23rd Louisiana Infantry Regiment
Vicksburg, location.citytown.postal_codes, 39183
Illinois, common.topic.webpage, m.09yw15r
James B. McPherson, common.topic.image, James B. McPherson
m.049y2lz, military.military_command.military_conflict, Siege of Vicksburg
Warren County, location.us_county.hud_county_place, Vicksburg
Siege of Vicksburg, military.military_conflict.military_personnel_involved, William F. Draper
21st Illinois Volunteer Infantry Regiment, common.topic.article, m.02rzchw
John C. Pemberton, common.topic.image, John C. Pemberton
Ulysses S. Grant, military.military_person.participated_in_conflicts, Battle of Shiloh
Siege of Vicksburg, military.military_conflict.military_personnel_involved, John S. Bowen
Ralph Pomeroy Buckland, military.military_person.participated_in_conflicts, American Civil War
James B. McPherson, military.military_person.participated_in_conflicts, American Civil War
James B. McPherson, military.military_person.participated_in_conflicts, Battle of Fort Donelson
Carter L. Stevenson, military.military_person.service, m.04m9x18
21st Illinois Volunteer Infantry Regiment, military.military_unit.armed_force, Union Army
John C. Pemberton, military.military_person.service, m.08cqtg1
John S. Bowen, military.military_person.participated_in_conflicts, American Civil War
James B. McPherson, military.military_person.participated_in_conflicts, Battle of Fort Henry
James B. McPherson, military.military_person.participated_in_conflicts, Siege of Vicksburg
Siege of Vicksburg, military.military_conflict.military_personnel_involved, Ralph Pomeroy Buckland
Grant's Operations Against Vicksburg, common.topic.notable_for, g.125b421pj
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Champion Hill
m.0dl56tp, military.military_command.military_commander, Robert E. Lee
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Snyder's Bluff
Henry Casey, military.military_person.service, m.0zfhw9p
Seth Barton, military.military_person.participated_in_conflicts, Battle of Chancellorsville
Peter Joseph Osterhaus, military.military_person.participated_in_conflicts, Battle of Lookout Mountain
Siege of Vicksburg, military.military_conflict.military_personnel_involved, William D. Turner
22nd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Snyder's Bluff
Battle of Chancellorsville, military.military_conflict.military_personnel_involved, Seth Barton
Siege of Vicksburg, base.culturalevent.event.entity_involved, United States of America
23rd Louisiana Infantry Regiment, military.military_unit.place_of_origin, Louisiana
David Farragut, common.topic.article, m.0pzfr
Battle of Snyder's Bluff, base.americancivilwar.battle.military_units_involved_in_this_conflict, 22nd Louisiana Infantry Regiment
Mississippi, travel.travel_destination.tourist_attractions, Vicksburg National Military Park
William D. Turner, military.military_person.participated_in_conflicts, American Civil War
31st Louisiana Infantry Regiment, common.topic.notable_for, g.125953t5s
Battle of Chickasaw Bayou, base.americancivilwar.battle.military_units_involved_in_this_conflict, 26th Louisiana Infantry Regiment
26th Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
Warren County, location.location.contains, Vicksburg National Military Park
22nd Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
James B. McPherson, military.military_commander.military_commands, m.04yz15j
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 22nd Louisiana Infantry Regiment
m.04yz15j, military.military_command.military_commander, James B. McPherson
m.0c058rz, military.military_command.military_commander, Robert E. Lee
Battle of Port Gibson, base.americancivilwar.battle.military_units_involved_in_this_conflict, 31st Louisiana Infantry Regiment
31st Louisiana Infantry Regiment, common.topic.notable_types, Military unit
17th Louisiana Infantry Regiment, common.topic.notable_for, g.1257wxtn6
Vicksburg Campaign, military.military_conflict.military_personnel_involved, Joseph E. Johnston
Siege of Vicksburg, time.event.locations, Warren County
Joseph E. Johnston, military.military_person.participated_in_conflicts, Atlanta Campaign
Ulysses S. Grant, military.military_person.participated_in_conflicts, Siege of Vicksburg
Siege of Vicksburg, common.topic.notable_types, Military Conflict
Siege of Vicksburg, time.event.included_in_event, American Civil War
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 17th Louisiana Infantry Regiment
3rd Louisiana Infantry Regiment, common.topic.notable_for, g.1257wxtdr
27th Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
Peter Joseph Osterhaus, military.military_person.participated_in_conflicts, Siege of Vicksburg
31st Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
Battle of Chickasaw Bayou, base.americancivilwar.battle.military_units_involved_in_this_conflict, 29th Louisiana Infantry Regiment
David Farragut, military.military_person.participated_in_conflicts, War of 1812
Siege of Vicksburg, military.military_conflict.military_personnel_involved, David Farragut
William F. Draper, military.military_person.participated_in_conflicts, Siege of Petersburg
m.04yw837, military.military_command.military_commander, James B. McPherson
m.09wbtxf, common.webpage.topic, Illinois
3rd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Wilson's Creek
Carter L. Stevenson, military.military_person.participated_in_conflicts, Siege of Vicksburg
Battle of Chickasaw Bayou, base.americancivilwar.battle.military_units_involved_in_this_conflict, 31st Louisiana Infantry Regiment
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 29th Louisiana Infantry Regiment
Battle of Pea Ridge, base.americancivilwar.battle.military_units_involved_in_this_conflict, 3rd Louisiana Infantry Regiment
Grant's Operations Against Vicksburg, time.event.included_in_event, Vicksburg Campaign
Battle of Stirling's Plantation, base.americancivilwar.battle.military_units_involved_in_this_conflict, 31st Louisiana Infantry Regiment
Ulysses S. Grant, military.military_person.participated_in_conflicts, Battle of Chapultepec
Vicksburg, travel.travel_destination.tourist_attractions, Vicksburg National Military Park
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Port Gibson
21st Illinois Volunteer Infantry Regiment, military.military_service.unit, m.04h_h95
m.0jvvyr2, location.administrative_division_capital_relationship.capital, Vicksburg
Vicksburg Campaign, time.event.includes_event, Grant's Operations Against Vicksburg
3rd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
Grant's Operations Against Vicksburg, common.topic.notable_types, Military Conflict
Battle of Jackson, Mississippi, time.event.included_in_event, Grant's Operations Against Vicksburg
Illinois, common.topic.webpage, m.09x0mns
Battle of Fort Henry, military.military_conflict.military_personnel_involved, James B. McPherson
31st Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Port Gibson
m.0b45xgk, common.webpage.topic, Illinois
Henry Dow, military.military_person.participated_in_conflicts, Siege of Vicksburg
John Alexander McClernand, military.military_person.participated_in_conflicts, American Civil War
Battle of Helena, time.event.included_in_event, Grant's Operations Against Vicksburg
21st Illinois Volunteer Infantry Regiment, organization.organization.place_founded, Union
Battle of Grand Gulf, time.event.locations, Vicksburg
m.09y6q5w, common.webpage.topic, Illinois
Vicksburg, location.hud_county_place.place, Vicksburg
John S. Bowen, military.military_person.service, m.0130p5g5
21st Illinois Volunteer Infantry Regiment, common.topic.notable_types, Military unit
Illinois, common.topic.article, m.03v13
Ulysses S. Grant, military.military_person.participated_in_conflicts, Battle of Fort Donelson
James B. McPherson, military.military_person.participated_in_conflicts, Battle of Atlanta
Siege of Vicksburg, base.culturalevent.event.entity_involved, John C. Pemberton
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 3rd Louisiana Infantry Regiment
26th Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Chickasaw Bayou
Peter Joseph Osterhaus, common.topic.notable_for, g.125b5lrr3
17th Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Chickasaw Bayou
23rd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Siege of Vicksburg
P. G. T. Beauregard, military.military_person.participated_in_conflicts, Battle of Shiloh
m.049y2m5, military.military_command.military_conflict, Siege of Vicksburg
Battle of Raymond, time.event.included_in_event, Grant's Operations Against Vicksburg
Vicksburg, book.written_work.subjects, United States of America
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Milliken's Bend
James B. McPherson, military.military_person.service, m.04hwd71
Battle of Snyder's Bluff, time.event.included_in_event, Grant's Operations Against Vicksburg
Vicksburg, location.location.time_zones, Central Time Zone
m.049y2pc, military.military_combatant_group.conflict, Siege of Vicksburg
William F. Draper, military.military_person.participated_in_conflicts, Battle of the Wilderness
27th Louisiana Infantry Regiment, common.topic.notable_for, g.12582skhp
Robert E. Lee, military.military_person.participated_in_conflicts, Battle of Chancellorsville
Mississippi, book.book_subject.works, Vicksburg
Ralph Pomeroy Buckland, common.topic.notable_for, g.1255jhlvw
26th Louisiana Infantry Regiment, military.military_unit.place_of_origin, Louisiana
Illinois, common.topic.webpage, m.04lstq9
Warren County, location.us_county.county_seat, Vicksburg
m.0gmk85m, common.webpage.topic, Illinois
Siege of Vicksburg, common.topic.notable_for, g.125fntmgj
23rd Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
Siege of Vicksburg, common.topic.article, m.01hf7m
Battle of Big Black River Bridge, time.event.included_in_event, Grant's Operations Against Vicksburg
David Farragut, military.military_person.service, m.04hxb1t
Vicksburg, location.citytown.postal_codes, 39180
Fought in this battle, rdf-schema#range, Military Conflict
James B. McPherson, military.military_commander.military_commands, m.04yw837
Vicksburg, book.written_work.subjects, Mississippi
Henry Halleck, military.military_person.participated_in_conflicts, Mexican–American War
Battle of Milliken's Bend, time.event.included_in_event, Grant's Operations Against Vicksburg
27th Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
John S. Bowen, military.military_person.service, m.062v9xy
Siege of Vicksburg, base.schemastaging.context_name.pronunciation, g.125_lwv14
John S. Bowen, military.military_person.participated_in_conflicts, Battle of Shiloh
Illinois, common.topic.webpage, m.09wbtxf
Illinois, common.topic.webpage, m.0b460kp
Vicksburg Campaign, time.event.included_in_event, Western Theater of the American Civil War
Siege of Vicksburg, base.culturalevent.event.entity_involved, Ulysses S. Grant
Battle of Chickasaw Bayou, base.americancivilwar.battle.military_units_involved_in_this_conflict, 17th Louisiana Infantry Regiment
Siege of Vicksburg, military.military_conflict.commanders, m.049y2lz
3rd Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
22nd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Chickasaw Bayou
Illinois, common.topic.webpage, m.09x171t
Peter Joseph Osterhaus, military.military_person.service, m.08cvct8
Peter Joseph Osterhaus, military.military_person.participated_in_conflicts, American Civil War
22nd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Capture of New Orleans
Vicksburg Campaign, common.topic.notable_types, Military Conflict
James B. McPherson, military.military_person.participated_in_conflicts, Battle of Shiloh
3rd Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Second Battle of Corinth
17th Louisiana Infantry Regiment, common.topic.notable_types, Military unit
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Raymond
26th Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
James B. McPherson, common.topic.notable_for, g.1259sb5xf
Siege of Vicksburg, base.culturalevent.event.entity_involved, Confederate States of America
David Farragut, military.military_person.participated_in_conflicts, American Civil War
29th Louisiana Infantry Regiment, base.americancivilwar.military_unit.conflicts_participated_in, Battle of Chickasaw Bayou
26th Louisiana Infantry Regiment, common.topic.notable_for, g.125933dkl
George B. McClellan, military.military_person.participated_in_conflicts, American Civil War
29th Louisiana Infantry Regiment, common.topic.notable_for, g.125g_ql3l
Siege of Vicksburg, military.military_conflict.military_personnel_involved, James B. McPherson
John C. Pemberton, common.topic.article, m.02_qh6
Warren County, location.location.contains, Vicksburg
23rd Louisiana Infantry Regiment, common.topic.notable_for, g.1255ddld9
Regiment, common.topic.article, m.0167lm
Battle of Port Gibson, time.event.included_in_event, Grant's Operations Against Vicksburg
Siege of Vicksburg, time.event.locations, Mississippi
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Jackson, Mississippi
m.049y2m5, military.military_command.military_commander, John C. Pemberton
Siege of Vicksburg, base.culturalevent.event.entity_involved, Ulysses S. Grant
Mississippi, location.location.events, Siege of Vicksburg
29th Louisiana Infantry Regiment, military.military_unit.unit_size, Regiment
21st Illinois Volunteer Infantry Regiment, common.topic.notable_for, g.1255b7dk7
Vicksburg, location.location.events, Battle of Grand Gulf
29th Louisiana Infantry Regiment, military.military_unit.armed_force, Confederate States Army
John S. Bowen, military.military_person.participated_in_conflicts, Siege of Vicksburg
John C. Pemberton, common.topic.image, JCPembertonBLY
Illinois, common.topic.webpage, m.0gmk85m
m.04fvcs7, military.military_combatant_group.conflict, Siege of Vicksburg
m.0gmkgpk, military.casualties.combatant, Confederate States of America
Siege of Vicksburg, time.event.included_in_event, Grant's Operations Against Vicksburg
Carter L. Stevenson, military.military_person.participated_in_conflicts, Battle of Lookout Mountain
Ulysses S. Grant, military.military_person.participated_in_conflicts, Battle of Molino del Rey
Vicksburg, location.location.contains, Vicksburg National Military Park
m.0b460kp, common.webpage.topic, Illinois
22nd Louisiana Infantry Regiment, common.topic.notable_for, g.12557cs0j
Battle of Shiloh, military.military_conflict.military_personnel_involved, John Alexander McClernand
m.049y3bl, military.military_command.military_commander, Robert E. Lee
John Alexander McClernand, common.topic.notable_for, g.125d3_8ty
Warren County, location.location.events, Siege of Vicksburg
Regiment, common.topic.image, 1st Battalion, The Duke of Wellington's Regiment
Battle of Shiloh, military.military_conflict.military_personnel_involved, Ralph Pomeroy Buckland
Grant's Operations Against Vicksburg, time.event.includes_event, Battle of Helena
Joseph E. Johnston, military.military_person.participated_in_conflicts, American Civil War
John S. Bowen, military.military_person.participated_in_conflicts, Battle of Port Gibson
Siege of Vicksburg, military.military_conflict.combatants, m.04fvcs7
m.09wtmzk, common.webpage.topic, Illinois
Henry Halleck, military.military_person.participated_in_conflicts, American Civil War
William F. Draper, military.military_person.participated_in_conflicts, Battle of Globe Tavern
Seth Barton, military.military_person.participated_in_conflicts, Siege of Vicksburg
Siege of Vicksburg, base.americancivilwar.battle.military_units_involved_in_this_conflict, 27th Louisiana Infantry Regiment
m.04h_h95, military.military_service.unit, 21st Illinois Volunteer Infantry Regiment
James B. McPherson, military.military_person.participated_in_conflicts, Battle of Kennesaw Mountain
Joseph E. Johnston, military.military_person.participated_in_conflicts, Vicksburg Campaign
Peter Joseph Osterhaus, military.military_person.participated_in_conflicts, Battle of Pea Ridge
m.09x171t, common.webpage.topic, Illinois
Robert E. Lee, people.person.nationality, Confederate States of America
Peter Joseph Osterhaus, military.military_person.participated_in_conflicts, Battle of Wilson's Creek
Battle of Chickasaw Bayou, time.event.locations, Vicksburg
Union Army, common.topic.image, Noncommissioned officers of the 93rd New York Infantry.
Battle of Shiloh, military.military_conflict.military_personnel_involved, James B. McPherson
Henry Casey, military.military_person.participated_in_conflicts, Siege of Vicksburg
Ralph Pomeroy Buckland, military.military_person.service, m.08ctt3d
Vicksburg, location.location.containedby, Warren County
John Alexander McClernand, military.military_person.participated_in_conflicts, Battle of Arkansas Post
3rd Louisiana Infantry Regiment, common.topic.notable_types, Military unit
m.049yl2q, military.military_command.military_commander, James B. McPherson
Illinois, common.topic.webpage, m.09yh7gb
Grant's Operations Against Vicksburg, base.americancivilwar.campaign.theater, Western Theater of the American Civil War

Answer: Ulysses S. Grant