Jan. 4 - 40th Congress convened - Ben Wade as president pro tem.
Jan. 7 - resolution by James "Impeachment" Ashley of Ohio to authorize the House Judiciary Committee to investigate if President Andrew Johnson was guilty of "high crimes and misdemeanors"
June 1 - Committee voted 5-4 no grounds for impeachment; Congress adjourned.
June 20 - Gen. Sheridan rebuked by Johnson for removal of southern officials, AG Henry Stanbery ruling that limited army to only police duties. Johnson declared that military governors could not challenge loyalty oaths in registration of voters, must go to southern state courts.
July 19 - Congress plugged loophole of Stanbery, passed 3rd Reconstruction Act that affirmed power of army to remove officials. Johnson replaced Gen. Sheridan with Gen. Winfield Hancock in Texas, and replaced Sickles with Canby in SC, and Pope with Meade.
Aug. 5 - Johnson replaced Secretary of War Stanton with Grant.
Nov. - state elections in North became "Great Reaction" against Radical Republicans and black suffrage.
Dec. 7 - 40th Congress reconvened with greater support for moderates, House voted against Judiciary Committee impeachment recomendation 108-57.
Jan. 13 - Congress refused to recognize Stanton's dismissal.
Jan. 14 - Grant departed after Cabinet meeting, allowed Stanton to return.
Jan. - Thaddeus Stevens introduced impeachment bill from his own Joint Committee.
Feb. 20 - Johnson again removed Stanton, with Gen. Lorenzo Thomas.
Feb. 21 - Stanton barricaded in his office, Johnson decided to arrest Thomas instead.
Feb. 22 - House adjourned due to rumor of nitroglycerine missing from NYC police.
Feb. 24 - House passed Covode resolution 126-47 to impeach Johnson on 11 counts, including counts 1-8 regarding the removal of Stanton and violation of the Tenure of Office Act; count 9 the "Emory article" due to Johnson's order to Emory to violate the Army Act of Mar. 2, 1867; count 10 the "Butler article" that Johnson had "defiled Congress" and the Senate; count 11 the "omnibus article" that repeated previous counts.
Mar. 4 - impeachment trial began in Senate, for 11 weeks until May 16, under Chief Justice Salmon Chase, with counsels Benj. Curtis and Wm Evarts for Johnson, and House managers John Bingham and Ben Butler.
Mar. 27 - Congress repealed the Habeas Corpus Act of 1867, originally passed to protect freedmen from black codes, in order to deny jurisdiction to the Supreme Court to hear the appeal of a Miss. editor William McCardle arrested by the army for publishing anti-reconstruction articles, in the case ex parte McCardle and prevented the Court from ruling on the constitutionality of the Reconstruction Acts.
May 16 - Senate voted 35-19 to convict (7 Republicans and 12 Democrats opposed), one vote short of the required 2/3. Radicals passed bill to investigate charges of corruption against the 7 Republicans, who would never hold office again, but no evidence of bribery or corruption.
May 21 - Republican Convention opened, would nominate Grant for President and Schuyler Colfax for VP.
June - Congress re-admitted 7 states (Tenn. already re-admitted) that would help Republicans win the 1868 elections. A second wave in 1869 readmitted the last 3 states: TX, VA, MI