Bajirao I • Helium at Guntur • Netaji Bose • 19th Amendment • Indonesia Constitution • Sapt Dhara 2026
Today in History on August 18: Important Events, Current Affairs, GK and MCQs
August 18 is an especially useful date for Indian-history, science and competitive-exam revision. Maratha military leader Peshwa Bajirao I was born on August 18, 1700, while the date is also associated with one of the most remarkable science stories connected with present-day Andhra Pradesh.
During the total solar eclipse of August 18, 1868, French astronomer Pierre Janssen observed the Sun from Guntur and detected an unusual yellow spectral line. That observation became a crucial step in the discovery of helium, an element first recognised through solar spectroscopy before it was confirmed on Earth.
Other high-value exam links include the reported death of Netaji Subhas Chandra Bose after the Taihoku air crash in 1945, ratification of the 19th Amendment to the U.S. Constitution in 1920, adoption of Indonesia's first Constitution in 1945, and James Meredith's graduation in 1963. For 18.08.2026 current affairs, the Government of India has scheduled the “Sapt Dhara of Shakti” pledge programme at Pusa, New Delhi, with agriculture, rural development and expansion of the Lakhpati Didi programme as major focus areas.
August 18 in History: Quick Summary
| Year | Historical Event | Exam Area |
|---|---|---|
| 1700 | Peshwa Bajirao I was born on August 18. | Maratha History |
| 1868 | Pierre Janssen observed an unexplained yellow solar spectral line during the total eclipse at Guntur, an important step in the discovery of helium. | Science / Andhra GK |
| 1920 | The 19th Amendment to the U.S. Constitution was ratified, constitutionally protecting voting rights from denial on account of sex. | World Polity |
| 1945 | Historical accounts report that Netaji Subhas Chandra Bose died after injuries suffered in an air crash at Taihoku. | Freedom Struggle |
| 1945 | Indonesia's first Constitution was adopted on August 18, one day after the proclamation of independence. | Asian History |
| 1963 | James Meredith graduated from the University of Mississippi with a political science degree. | Civil Rights |
| 2026 | India's Agriculture and Rural Development ministries scheduled the “Sapt Dhara of Shakti” pledge programme at Pusa, New Delhi. | Current Affairs |
August 18 in Indian History
Birth of Peshwa Bajirao I
Bajirao I, one of the most important Peshwas of the Maratha Empire, was born on August 18, 1700. He was the son of Balaji Vishwanath and later served as Peshwa under Chhatrapati Shahu.
Bajirao is particularly remembered for fast-moving cavalry strategy and the expansion of Maratha political influence. The Palkhed campaign of 1728 against the Nizam is one of the best-known episodes associated with his military career.
Guntur Solar Eclipse and the Helium Discovery Story
On August 18, 1868, French astronomer Pierre Janssen observed a total solar eclipse from Guntur in present-day Andhra Pradesh. Using spectroscopy, he detected a bright yellow line in the solar spectrum that could not be matched with the known elements.
The observation became a crucial milestone in the discovery of helium. British astronomer Norman Lockyer independently studied the same spectral feature and recognised that it represented a previously unknown element. The name helium comes from Helios, the Greek word for the Sun.
August 18 and Netaji Subhas Chandra Bose
August 18, 1945 is conventionally associated with the reported death of Netaji Subhas Chandra Bose. A historical statement reproduced in the Nehru Archive records Habibur Rahman's account that the aircraft carrying Bose crashed at Taihoku in Formosa and that Bose died in hospital on the same date.
The circumstances of Netaji's death have remained the subject of long-running public debate and official inquiries. For exam preparation, students should remember the conventional historical date while recognising that the wider issue has been controversial.
Major World Historical Events on August 18
19th Amendment to the U.S. Constitution Ratified
The 19th Amendment to the United States Constitution was ratified on August 18, 1920. It established that the right of U.S. citizens to vote could not be denied or abridged by the United States or by a state on account of sex.
The amendment had been passed by the U.S. Congress on June 4, 1919. Tennessee became the decisive state needed to reach the constitutional ratification threshold.
Indonesia Adopted Its First Constitution
Indonesia proclaimed independence on August 17, 1945. On the following day, August 18, 1945, its first Constitution was adopted.
The Constitutional Court of the Republic of Indonesia identifies August 18, 1945 as the adoption date of the country's first Constitution, commonly referred to as the 1945 Constitution or UUD 1945.
James Meredith Graduated from the University of Mississippi
American civil-rights figure James Meredith graduated from the University of Mississippi on August 18, 1963 with a degree in political science.
Meredith had become the first African-American student admitted to the previously segregated university in 1962, making his enrollment an important event in the history of the U.S. civil-rights movement.
August 18, 2026 – Updated Current Affairs
“Sapt Dhara of Shakti” Pledge at Pusa
The Press Information Bureau announced that Union Minister for Agriculture & Farmers' Welfare and Rural Development Shivraj Singh Chouhan will lead a “Sapt Dhara of Shakti” pledge programme at the Pusa campus, New Delhi, on August 18.
The programme is intended to chart a roadmap for agriculture and rural development towards Viksit Bharat 2047.
Lakhpati Didi Target: 6 Crore
PIB states that 3 crore rural women have already become Lakhpati Didis and that a new target of 6 crore has been set.
The August 18 programme is expected to review the implementation roadmap for expanding the programme, including support through Self-Help Groups, skills, finance and market access.
Key Priorities for Exams
PIB identifies strengthening agriculture and food production, promoting food processing, expanding access to global markets and advancing self-reliance among the important priorities linked with the “Sapt Dhara of Shakti” framework.
Important Anniversary Numbers
326 years since Bajirao I's birth (1700), 158 years since Janssen's Guntur eclipse observation (1868), and 81 years since the conventional date associated with Netaji Bose's reported death (1945).
Static GK Connections for Competitive Exams
1. Bajirao I
- Born: August 18, 1700
- Father: Balaji Vishwanath
- Position: Peshwa of the Maratha Empire
- Important campaign: Palkhed, 1728
- Associated ruler: Chhatrapati Shahu
2. Helium and Guntur
- Date: August 18, 1868
- Scientist: Pierre Janssen
- Place: Guntur, present-day Andhra Pradesh
- Method: Spectroscopy during a total solar eclipse
- Atomic number: 2
- Periodic-table group: 18
- Name origin: Helios = Sun
3. Netaji Subhas Chandra Bose
- Born: January 23, 1897
- Birth anniversary: Parakram Diwas
- Associated organisation: Indian National Army (INA)
- Conventional reported-death date: August 18, 1945
- Reported crash location: Taihoku, Formosa (present-day Taipei, Taiwan)
4. U.S. 19th Amendment
- Congressional passage: June 4, 1919
- Ratification: August 18, 1920
- Main issue: Voting rights and sex discrimination
- Decisive ratifying state: Tennessee
5. Indonesia – Constitution
- Independence proclamation: August 17, 1945
- First Constitution adopted: August 18, 1945
- Common name: 1945 Constitution / UUD 1945
6. Lakhpati Didi – 2026 Update
- Administrative ministry: Ministry of Rural Development
- Milestone cited by PIB: 3 crore rural women
- New target: 6 crore Lakhpati Didis
- Linked approach: Self-Help Groups, skills, finance and market opportunities
Memory Trick for August 18
Remember: B – H – V – N/I – M – S
Bajirao 1700 → Helium/Guntur 1868 → Vote/19th Amendment 1920 → Netaji and Indonesia Constitution 1945 → Meredith 1963 → Sapt Dhara 2026.
Year Chain: 1700 → 1868 → 1920 → 1945 → 1963 → 2026.
Do Not Confuse
1. Janssen's Observation vs Complete Discovery of Helium
On August 18, 1868, Pierre Janssen observed the unusual yellow solar spectral line at Guntur. Norman Lockyer independently analysed the same feature and associated it with a new element. Helium was later confirmed on Earth. For exams, connect Guntur + 1868 + spectroscopy + helium, but do not treat every stage of the discovery as one event by one scientist.
2. Netaji's Birth Anniversary vs August 18
January 23 is Netaji Subhas Chandra Bose's birth anniversary and is observed as Parakram Diwas. August 18, 1945 is the conventional date associated with reports of his death after the Taihoku air crash.
3. 19th Amendment – Passage vs Ratification
The amendment was passed by the U.S. Congress on June 4, 1919 and ratified on August 18, 1920. These are different constitutional stages.
4. Indonesia Independence vs Constitution
August 17, 1945: proclamation of independence. August 18, 1945: adoption of the first Constitution.
5. Bajirao I vs Bajirao II
Bajirao I was the eighteenth-century Peshwa associated with Maratha expansion and Palkhed. Bajirao II was a later Peshwa connected with the period of the Anglo-Maratha conflicts. Do not mix the two in objective questions.
August 18 Quick Revision
- Peshwa Bajirao I was born on August 18, 1700.
- Balaji Vishwanath was Bajirao I's father.
- The Battle of Palkhed is associated with Bajirao I and the Nizam.
- Pierre Janssen observed the August 18, 1868 total solar eclipse from Guntur.
- Janssen detected an unexplained yellow solar spectral line linked with the discovery of helium.
- Helium has atomic number 2 and belongs to Group 18.
- The U.S. 19th Amendment was ratified on August 18, 1920.
- The amendment constitutionally protects voting rights from denial on account of sex.
- August 18, 1945 is conventionally associated with the reported death of Netaji Subhas Chandra Bose.
- Indonesia's first Constitution was adopted on August 18, 1945.
- James Meredith graduated from the University of Mississippi on August 18, 1963.
- The “Sapt Dhara of Shakti” pledge programme is scheduled at Pusa, New Delhi, on August 18, 2026.
- PIB cites 3 crore Lakhpati Didis and a new target of 6 crore.
10 MCQs
1. Peshwa Bajirao I was born on which date?
Bajirao I later became a leading Peshwa of the Maratha Empire and is strongly associated with the Palkhed campaign of 1728. Read complete fact.
2. Which astronomer observed the 1868 solar eclipse from Guntur and detected the spectral line linked with helium?
Janssen observed an unusual yellow line in the Sun's spectrum during the total solar eclipse of August 18, 1868 at Guntur. Read complete fact.
3. What is the atomic number of helium?
Helium is element No. 2 and is a noble gas in Group 18. The Guntur eclipse connection makes this static-science fact especially useful for APPSC exams. Read complete fact.
4. The 19th Amendment to the U.S. Constitution was ratified on August 18 of which year?
The amendment was passed by Congress in 1919 and ratified on August 18, 1920; it protects voting rights from denial on account of sex. Read complete fact.
5. August 18, 1945 is conventionally associated with the reported death of which Indian freedom fighter?
Historical accounts report that Bose died after the Taihoku air crash; the circumstances have remained controversial. His January 23 birth anniversary is observed as Parakram Diwas. Read complete fact.
6. Indonesia's first Constitution was adopted on which date?
Indonesia proclaimed independence on August 17 and adopted its first Constitution on August 18, 1945. Read complete fact.
7. James Meredith, an important U.S. civil-rights figure, graduated in 1963 from which institution?
Meredith graduated on August 18, 1963 with a degree in political science after becoming the first African-American student admitted to the segregated university in 1962. Read complete fact.
8. The “Sapt Dhara of Shakti” pledge programme scheduled for August 18, 2026 is to be held at which place?
PIB announced that Union Minister Shivraj Singh Chouhan would lead the programme, linking agriculture and rural-development roadmaps with Viksit Bharat 2047. Read complete fact.
9. What new Lakhpati Didi target is cited in the August 2026 PIB update?
PIB states that 3 crore rural women have already become Lakhpati Didis and that the new target is 6 crore. Read complete fact.
10. August 18, 2026 falls on which day of the week?
August 18 is the 230th day of 2026, leaving 135 days in the year after this date. Revise the complete August 18 post.
Frequently Asked Questions
1. Why is August 18 important in Indian history?
It is the birth anniversary of Peshwa Bajirao I, is associated with Pierre Janssen's 1868 Guntur solar-eclipse observation linked with helium, and is the conventional date associated with reports of Netaji Subhas Chandra Bose's death in 1945.
2. What is the Guntur–helium connection?
During the total solar eclipse of August 18, 1868, Pierre Janssen observed from Guntur and detected an unusual yellow solar spectral line that became a key step in the discovery of helium.
3. Did Pierre Janssen alone complete the discovery of helium on August 18, 1868?
No. Janssen's observation was a crucial step. Norman Lockyer independently analysed the spectral feature and associated it with a new element, while helium was later confirmed on Earth.
4. When was Peshwa Bajirao I born?
Bajirao I was born on August 18, 1700 and later became one of the most prominent Peshwas of the Maratha Empire.
5. What happened to Netaji Subhas Chandra Bose on August 18, 1945?
Historical accounts report that he died after injuries sustained when an aircraft crashed at Taihoku in Formosa. The circumstances surrounding his death have remained controversial.
6. What is the importance of August 18, 1920 in U.S. history?
The 19th Amendment to the U.S. Constitution was ratified on that date, protecting voting rights from denial on account of sex.
7. When did Indonesia adopt its first Constitution?
Indonesia's first Constitution was adopted on August 18, 1945, one day after the proclamation of independence.
8. Who was James Meredith?
James Meredith was a U.S. civil-rights figure and the first African-American student admitted to the segregated University of Mississippi. He graduated there on August 18, 1963.
9. What is the “Sapt Dhara of Shakti” August 18, 2026 update?
PIB announced a programme at Pusa, New Delhi, led by Union Minister Shivraj Singh Chouhan to develop agriculture and rural-development roadmaps towards Viksit Bharat 2047.
10. What is the new Lakhpati Didi target mentioned by PIB in August 2026?
The new target is 6 crore Lakhpati Didis; PIB states that 3 crore rural women have already reached Lakhpati Didi status.
Related History and GK Posts
- August 17 in History: Important Events, GK and MCQs
- August 16 in History: Important Events, GK and MCQs
- August 15 in History: Important Events, GK and MCQs
- Explore All Today in History Articles
- Static GK for Competitive Exams
Official and Reliable Sources
- American Physical Society – August 18, 1868 and the Discovery of Helium
- Royal Society of Chemistry – Helium: atomic and discovery information
- BYJU'S / UPSC Notes – Baji Rao I (1700–1740)
- Government of Maharashtra Gazetteers – Bajirao and the Palkhed campaign
- Nehru Archive – Historical statement on Subhas Bose and August 18, 1945
- Prime Minister of India – Netaji and Parakram Diwas, 2026
- U.S. National Archives – 19th Amendment
- Constitutional Court of the Republic of Indonesia – Constitution adopted August 18, 1945
- U.S. National Archives – James Meredith
- Press Information Bureau – “Sapt Dhara of Shakti” programme and 6 crore Lakhpati Didi target, August 2026
Conclusion
August 18 gives competitive-exam aspirants an unusually strong combination of Maratha history, Andhra Pradesh science history, the Indian freedom struggle, constitutional history, civil rights and 2026 rural-development current affairs.
For fast revision, remember: Bajirao 1700 → Guntur/Helium 1868 → 19th Amendment 1920 → Netaji & Indonesia Constitution 1945 → Meredith 1963 → Sapt Dhara / 6 Crore Lakhpati Didis 2026.
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