American Revolutionary War: Military Campaigns & Turning Points (1775-1783)

Context & Strategic Imperatives

  • Independence (vote 07/02/1776, ratified 07/04/1776) pursued not only for ideology but to secure European alliances—chiefly France, Spain, the Netherlands.
  • Europeans demanded proof the rebellion was serious; military victories had to complement revolutionary rhetoric.
  • Benjamin Franklin’s Paris mission: played frontier caricature (coonskin cap) to win French sympathy; diplomacy would bear fruit
    once U.S. forces demonstrated competence.

Comparative Strengths & Weaknesses

  • British advantages
    • Professional army & world’s most powerful navy.
    • Larger population & economy.
    • 30,000 German mercenaries (≈£4.7 million spent) → “Hessians.”
  • British liabilities
    • 3,000-mile supply line; vast coastline impossible to blockade.
    • Divided British public & Parliament; war-weariness after earlier conflicts.
    • Must suppress rebellion yet win “hearts & minds”—conflicting goals; harsh tactics backfire PR-wise.
  • American advantages
    • Home-field, interior supply, sympathetic civilians.
    • Expansive countryside for guerrilla war.
    • Potential European aid (funds, powder, fleets).
  • American liabilities
    • Ad-hoc volunteer army, short enlistments, scant artillery & navy.
    • Chronic shortages; officer inexperience; desertion risk.

Pre-Declaration Combat (1775–Spring 1776)

  • April 1775: Lexington & Concord (“shots heard ’round the world”).
  • June 1775: Bunker (Breed’s) Hill—costly British win → Gage replaced by Gen. William Howe (army) & Adm. Richard Howe (navy).
  • June 1775: Congress authorizes two-pronged Canada invasion.
    • Gen. Richard Montgomery via Lake Champlain: captures Montréal (11/1775).
    • Col. Benedict Arnold through Maine wilderness: reaches Québec (11/1775) exhausted.
    • Joint assault 12/31/1775 fails; Montgomery killed, Arnold wounded; invasion collapses by 01/1776.

Siege of Boston & Knox’s “Noble Train of Artillery”

  • May 1775: Ethan Allen & Green Mountain Boys seize Fort Ticonderoga; 59 cannon captured.
  • Winter 1775–76: Col. Henry Knox hauls ~60 tons of artillery 300 mi across snow/ice to Boston (Dec-Feb).
  • 03/04/1776: Washington occupies Dorchester Heights, positions cannon→overnight fortifications.
  • 03/17/1776 (Evacuation Day/St. Patrick’s): Howe evacuates Boston w/ troops & Loyalists to Halifax, Nova Scotia.
    • Boosts Patriot morale; seen as divine favor (Abigail Adams) & strategic proof of viability (Washington).

British Grand Plan for 1776: New York & Hudson Corridor

  • Objectives: seize NYC + Hudson River, isolate New England, inspire Loyalist surge.
  • April 1776: Washington moves ≈17,000 troops from Boston to NY region; splits forces (Long Island, Manhattan, NJ).
  • British assemble 30,000 (largest overseas expedition to date) + Hessians; land Staten Island June.
Battle of Long Island / Brooklyn (08/27/1776)
  • Gen. Henry Clinton envelops U.S. left; Continental loss ≈1,500.
  • Howe hesitates (Bunker Hill memories), permits miraculous nocturnal evacuation (9,000) across East River → Manhattan, thanks to Maryland “400” sacrifice (256 KIA → Maryland = “Old Line State”).
Fall of Manhattan & Nathan Hale
  • Mid-Sept: British drive U.S. to Harlem Heights; Great Fire of NYC (09/21)—likely Patriot arson (Congress denied permission).
  • Hale’s failed espionage; executed 09/24/1776 (“I only regret that I have but one life to lose for my country”).
  • Nov: Fort Washington falls; NYC remains British HQ until 1783.
NJ Retreat & “The Crisis”
  • Dec 1776: Washington chased Newark→New Brunswick→across Delaware to PA; Howe issues pardons—5,000 NJers (incl. signer Richard Stockton) swear loyalty.
  • Thomas Paine publishes The Crisis No. 1 (12/23)—“These are the times that try men’s souls”; denounces “sunshine patriots.”
Trenton–Princeton Counterstroke
  • 12/25–26/1776: Washington recrosses Delaware, surprises Hessians at Trenton.
  • 01/03/1777: Victory at Princeton; secures winter quarters Morristown.
    • Restores morale; denies British control of NJ corridor; protects Philadelphia temporarily.

1777 Philadelphia Campaign

  • Howe sails from NY to Chesapeake (07/23/1777), marches north.
  • Battles:
    • Brandywine Creek (09/11) & Germantown (10/04) → U.S. defeats.
  • Philadelphia falls 09/26/1777; limited Loyalist enthusiasm; Congress flees.

Saratoga Campaign: Turning Point

  • Gen. John Burgoyne advances from Montréal (06/1777) w/ 5,000 regulars + 3,000 Hessians + Iroquois allies.
    • Recaptures Ticonderoga (07/06).
    • Slowed to 1 mi/day by U.S. obstructions; supply woes.
    • Foraging detachment wiped at Bennington (08/16).
    • St. Leger’s western pincer stopped at Oriskany (08/06).
  • Battles of Freeman’s Farm (09/19) & Bemis Heights (10/07).
    • Casualties: British 1,200 vs. U.S. 500.
  • Burgoyne surrenders 6,000 at Saratoga (10/17/1777) to Gen. Horatio Gates.
  • Strategic effects: convinces France of viability; formal Franco-American alliance signed 02/1778 (follow-on Spanish & Dutch hostility to Britain).

International & Professionalization Factors

  • French covert aid (arms, powder) since 1775; formal after Saratoga.
  • Foreign volunteers
    • Polish: Thaddeus Kościuszko (engineer), Casimir Pulaski (cavalry).
    • Prussian: Baron Friedrich von Steuben drills troops at Valley Forge.
  • Winter at Valley Forge (1777-78)
    • ~20 mi NW of occupied Philadelphia; freezing, supply shortages.
    • Von Steuben’s “Blue Book” drills → transforms Continental discipline.

Monmouth Courthouse (06/28/1778)

  • Clinton evacuates Philadelphia overland to NY; Washington attacks.
  • 100 °F heat; local civilians ("Molly Pitcher" legend) carry water; inconclusive but U.S. shows it can stand toe-to-toe.
    • British losses: 300 KIA + 600 captured; U.S. tactical draw = strategic morale win.

Treason at West Point (1780)

  • Benedict Arnold (wounded hero of Saratoga) given command of Hudson stronghold; secretly bargains with Maj. John André to surrender fort.
    • Scheme discovered; Arnold escapes to British lines, commissions as brigadier; André hanged.
    • “Benedict Arnold” becomes byword for betrayal.

Southern Theater (1778-1781): Civil-War-Like Brutality

  • British pivot south expecting Loyalist support & valuable ports.
  • Georgia: Savannah (12/29/1778) & Augusta (01/1779) captured.
    • Franco-American siege of Savannah (10/1779) fails (≈1,000 patriot casualties).
  • South Carolina: Charleston falls 05/1780; 5,500 U.S. POWs.
  • Waxhaws Massacre (05/29/1780): Lt. Col. Banastre Tarleton slaughters surrendering Virginians; fosters patriot rage (young POW Andrew Jackson scarred).
  • Guerrilla resistance
    • Francis “Swamp Fox” Marion in Pee Dee & Lowcountry.
  • Camden (08/16/1780): Cornwallis routs Gates; opens NC invasion.
  • Kings Mountain (10/07/1780): Patriot over-mountain men defeat Loyalist militia; execute prisoners for atrocities.
  • Cowpens (01/17/1781): Gen. Daniel Morgan defeats Tarleton; turning tide.
  • Gen. Nathanael Greene (“Fighting Quaker”) strategy: survive, harass, stretch British logistics.
    • Guilford Courthouse (03/15/1781) costly British win → Pyrrhic.

Yorktown: Decisive Climax

  • Cornwallis fortifies Yorktown, VA; expects Clinton’s relief from NY.
  • Franco-American convergence
    • Washington + Rochambeau march 17,000 from NY; Lafayette already shadowing Cornwallis.
    • Adm. de Grasse’s French fleet wins control of Chesapeake, blocks sea escape.
  • Siege (09/28-10/19/1781)
    • Continuous bombardment; parallel trenches; key Redoubts 9 & 10 stormed (Hamilton leads assault).
    • Cornwallis surrenders ≈7,000 (10/19/1781).
  • “World turned upside down” band tune; symbolic end of major combat though scattered skirmishes continue until 1783.

Human & Material Costs

  • U.S. deaths ≈25,000 (≈1 % of 2.5 million population).
    (Casualty Rate=25,0002,500,000=0.01=1%)(\text{Casualty Rate} = \frac{25,000}{2,500,000} = 0.01 = 1\%)
  • War duration: 04/1775–09/1783 → 8 years (longest until Vietnam & modern Middle-East involvements).

Treaty of Paris (09/03/1783)

  • Negotiators: Benjamin Franklin, John Adams, John Jay.
  • British recognition of U.S. independence.
  • Boundaries:
    • West → Mississippi River.
    • South → 31st parallel (Georgia/Spanish Florida line).
    • North → “Great Lakes” concept (exact demarcation unresolved).
  • Fishing rights off Newfoundland; evacuation of British troops; restitution for Loyalists nominally promised.

Broader Significance & Connections

  • Demonstrated synergy of ideology + pragmatic warfare: Enlightenment rhetoric alone insufficient without battlefield credibility.
  • Foreign alliances essential: French naval power decisive; globalizes conflict (Caribbean, India, Gibraltar).
  • Public-relations dimension: British missteps (Hessians, brutality, Tarleton) convert neutrals; mirrors modern “hearts-and-minds” doctrine.
  • American political culture shaped by:
    • Suspicion of standing armies (cont’l reliance on militia / volunteer ethos).
    • Celebration of civilian leadership (Washington’s willingness to serve & then resign 1783).
    • Myths & symbols (Hale, Molly Pitcher, Crossing Delaware) used to forge national identity.
  • Sets stage for post-war governance crisis: Articles of Confederation, constitutional debates—topic for next lecture.